初三英语期中考试卷
㈠ 初一英语人教版下册期中考试卷
一.辨音(5%)
()1、nameA.?B.?C.?D.?
()2、helloA.?B.?C.?D.?
()3、phoneA.?B.?C.?D.?
()4、cassetteA.?B.?C.?D.?
()5、soccerA.?C.?C.?D.?
二、词汇(15%)
A:按要求写单词(5%)
1、big(反义词)____________________
2、easy(反义词)____________
3、doesnot(缩写形式)________________
4、do(单数第三人称)________
5、10、heis(缩写形式)_____________
_6、be(同音词)_______________
7、theyare(缩写形式)_________________
8、itis(缩写形式)___________
9、donot(缩写形式)________________
_10、have(单数第三人称)_____
B:根据汉语提示完成句子(10%) 1、沙发靠近梳妆台。 Thesofais___________________thedresser. 2、课桌在床与沙发之间。 Thedeskis_________thebed______thesofa. 3、那个房间也有一台电脑。 ________acomputerinthatroom.
4、书在那个书箱里面吗? ________thebooksinthebookcase? 5、先生,很高兴认识你。 Niceto__________________,sir.
三.据句意及首字母提示,补全所缺单词(10%)
1、Isthath_________dictionary?yes,It’sTom’sdictionary.
2、Doyouknowhowyous________it?
3、canh_________spellhername?YesIthinkhecan.
4、Isthisy_______d_________?Yes,That’smine.(我的)
5、AreyouE________?No,I’mC________.
6、L___________:Mybackpack.Myn_______isSteve.Pleasec______543-5014.
四、单项选择(10%) ()1.—DoyoulikeEnglish? —Yes.Itis_________. A.boringB.notinterestingC.funD.bad ()2.—_______tennis. —Thatsoundsgood. A.LetplayB.Let’splayC.let’stoplayD.letustoplay ()3.—Where’smypen? —Idon’tknow,butyoucanwrite______apencil. A.onB.inC.withD.for ()4..Comeandmeet_______. A.theparentsB.mytheparentsC.myparentD.myparents. ()5.—Whatdoyouhave______breakfast? —Breadandmilk. A.eatB.forC.onD.with ()6.Nick______abaseball. A.nothaveB.don’thaveC.nothasD.doesn’thave ()7.—How_________doesJohnwant? —Six. A.manychickensB.muchbreadC.manyapplesD.muchtomatoes. ()8.Doyouknowtheanswer_________thesequestions? A.toB.ofC.forD.from ()9.—_________areyoushorts? —Twentyyuan. A.HowmuchB.WhatmoneyC.WhatsizeD.Whatcolor. ()10.—_________doyouspellexhibition? —E-X-H-I-B-I-T-I-O-N. A.WhatB.HowC.HowmuchD.When
五.情景交际(10%)
A:CanIhelpyou? B:Iwantadressformyself(我自己)andaT-shirtformy____.Sheisfour. A:_________________doyouwant? B:I________abluedressandaredT-shirt. A:Hereyouare. B:Oh,thedressisnice.ButtheT-shirtistoobig.Doyouhavea________T-shirt? Mydaughterisshort. A:Hereyouare. B:________________arethey? A:-shirtisfivedollars. B:Oh,________verycheap.I’ll________them.Thanks. A:You’re________.
六.对话组合,重新排列成一段对话(10%)
()Doyouhaveacomputergame? ()Let’splayvolleyball. ()Yes,Ido. ()Idon’tlikevolleyball. ()Great.Let’splaycomputergames!
七.阅读理解(30%)
(A) ThisisapictureofMrLi’sfamily.ThemaninthemiddleisMrLi.ThewomanisMrLi’swife.Theyhavetwosons.ThechildbehindMrLiisLiLei.He’sthirteen..He’seleven..Butnotinthesamegrade.LiLeiisinGradeTwo.LiMingisinGradeone.Theyaregoodstudents. ()1.Thereare_______peopleinthepicture. A.threeB.fourC.fiveD.six ()2.MrLiis_______LiLei. A.inforntof(在….前面)B.behindC.onD.under. ()3.MrandMrsLihave_________. A.oneboy,onegirlB.twochildrenC.twogirlsD.oneboy ()4.LiMingis_______brother. A.MrLi’sB.MrsLi’sC.LiLei’sD.wedon’tknow ()5.HowoldareLiLeiandLiMing?They’re_______. A.elevenandthirteenB.elevenandtwenlve C.twelveandelevenD.thirteenandeleven. (B) WangHongismygoodfriend.She’stwelve.I’mtwelve,too.MynameisKate.WangHongisinClass1,Grade1.She’sNumber8,inRow5.I’minClass1,Grade1,too.IamNumber9,inRow6.Weareatschooltoday. ()1.HowoldisWangHong?__________. A.SheiselevenB.She’stwelveC.She’sten ()2.WangHongandIare__________. A.girlsB.boysC.teachers ()3.WhatgradeareWangHongandIin?__________ A.GradeOneB.GradeTwoC.GradeThree ()4.WangHongismy__________. A.goodteacherB.goodfriendC.sister ()5.WhereareWangHongandItoday?__________. A.AthomeB.AtschoolC.Here. (C) LookatthepictureofLilyandLucy’sbedroom...Thedeskisnearthewindow..Aclockisonit,too..Lily’ssweaterisonherbed,butLucy’ssweaterisbehindherchair.Wherearetheirhats?Theyareonthesofa.Oh,no,theyareonthefloor.What’sonthesofa?Theyarecats.Theylooklikehats. ()1.Thisisapictureof__________. A.Lucy’sbedroomB.Lily’sbedroomC.LucyandLily’sbedroom ()2.Thereare________onthedesk. A,booksB.flowersandbooksC.flowers,booksandaclock ()3.Thebaseballbatsare_________. A.onthebedB.underthebedC.nearthebed ()4..Oneison_____bed,theother isbehind_____chair. A.Lily,LucyB.Lucy’s,Lily’sC.Lily’s,Lucy’s ()5._______areonthesofa. A.TheirhatsB.TheircatsC.Theirhatsandcats
八.书面表达(10%)
介绍一下你的朋友李雷,他是一个中国男孩,他喜欢棒球和电子游戏,他喜欢吃牛奶和汉堡包,他不喜欢……(不少于6句)
㈡ 我只要卷子,不要答案,九年级上物理,化学,期中测试卷,英语期末试卷,《新课堂AB卷》
初三化学试卷
可能用到的相对原子质量:H 1 C 12 N 14 O 16 F 19 Al 27 S 32 Ca 40 Cu 64
一、选择题(每小题只有一个选项符合题意。共30个小题,每小题1分,共30分。)
1.下列是一些人类生活所需要的热量,主要由化学变化产生的是
A.物体间相互摩擦产生的热量 B.天然气燃烧放出的热量
C.电熨斗通电放出的热量 D.太阳能热水器中的水所吸收的热量
2.下列空气的成分中,体积分数约占21%的气体是
A.氧气 B.氮气 C.二氧化碳 D.稀有气体
水质主要成分
每100 m L产品中
Na 0.1 ~2.0 mg
K 0.005 ~0.5 mg
Ca 0.1 ~1.2 mg
Mg 0.1~0.8 mg
3.某饮用水标签的部分内容如右图所示,这里的K、Ca等是指
A.原子 B.分子
C.元素 D.金属
4.决定元素种类的是原子的
A.电子数 B.中子数
C.质子数 D.最外层电子数
5.下列各种“水”,属于纯净物的是
A.自来水 B.矿泉水 C.小溪水 D.蒸馏水
6.在①酸雨 ②海水赤潮 ③温室效应 ④白色污染等环境问题中,由煤和石油等化石燃料燃烧造成的是
A.①②③④ B.①③ C.②④ D.①③④
7.保持氢气化学性质的粒子是
A.H B. H2O C.H2 D.2H
8.下列符号能表示两个氧原子的是
A.O2 B.2O C.2O2- D.2O2
9.下列物质的用途是利用其化学性质的是
A.稀有气体用于电光源 B.干冰用于人工降雨
C.氧气用于炼钢、气焊 D.铜线用于制电缆
24 Cr
铬
52.00
10.右图是元素周期表中的一格,从该图获取的信息是
A.该元素的质子数为52 B.该元素的原子序数为24
C.该元素在地壳中的含量为52.00% D.该元素属于非金属元素
11.下图所示实验操作不正确的是
A.过滤 B.取固体粉末 C.熄灭酒精灯 D.检查气密性
12.下列化学式正确的是
A.氮气N2 B.硫酸钾 KSO4 C.氧化镁MgO2 D.氢氧化铁Fe(OH)2
13.现有下列事实,①动物呼吸,②白磷自然,③食物腐烂,④火药爆炸。它们的共同点是
A.都发光 B.都属于缓慢氧化反应 C.都发生爆炸 D.都属于氧化反应
点燃
14.下列化学方程式书写正确的是
点燃
A.S + O2 SO2 B.S + O2 SO2↑
C.S + O2 SO2↑ D.S + O2 SO2
15.下列粒子结构示意图中,表示阳离子的是
A. B. C. D.
16.下列实验现象的描述中正确的是
A.蜡烛在氧气中燃烧时,产生水和二氧化碳
B.红磷在氧气中燃烧时,生成大量白色烟雾
C.硫粉在氧气中燃烧时,产生淡蓝色火焰,生成有刺激性气味的无色气体
D.水通电一段时间后,正极与负极产生的气体体积比约为1∶2
17.下列做法可实现预期目标的是
A.寻找新的催化剂使水变成汽油 B.常用自来水冲洗自行车可防止生锈
C.用氮气作焊接金属的保护气 D.向硬水中加明矾净水剂后得到纯水
18.轻轨电车与架空电线的接触点所用的材料应具有滑腻、不易氧化、能导电的性质。这种材料可选用
A.金刚石 B.铝 C.石墨 D.铜
19.将棉布手帕浸泡在酒精溶液(70体积酒精和30体积水混合而成)中,待均匀湿透后用镊子夹住两角取出,展开并点燃,当火焰熄灭后手帕完好无损。下列解释正确的是
A.这是魔术——你看到的是一种假象 B.水和酒精蒸发吸热使手帕温度低于棉布的着火点
C.酒精燃烧后使棉布的着火点升高 D.火焰的温度低于棉布的着火点
20.下列说法正确的是
A.合金、合成纤维、合成橡胶、塑料都是有机高分子材料
B.香烟、酒精、海洛因都是毒品
C.二氧化硫、二氧化碳、一氧化碳都是大气污染物
D.压缩天然气、乙醇汽油都是能减少空气污染的汽车燃料
21.鉴别空气、氧气、二氧化碳三瓶气体,通常的做法是
A.观察颜色并闻它们的气味 B.将气体分别通入澄清的石灰水中
C.将气体分别通入紫色石蕊溶液中 D.将燃着的木条分别伸入集气瓶中
22.2008年北京奥运会吉祥物是“福娃”,有一种“福娃”的外部材料为纯羊毛线,内充物为无毒的聚酯纤维。下列说法正确的是
A.羊毛是引起白色污染的主要物质 B.制作福娃的外部材料属于有机合成材料
C.聚酯纤维是天然材料 D.可以用燃烧的方法区分羊毛和聚酯纤维
23.要善于从化学的视角认识世界。对下列事实的解释错误的是
事 实 解 释
A. 干冰升华为二氧化碳气体 分子大小发生改变
B. 在公共场所吸烟导致周围的人被动吸烟 分子不断地运动
C. 由碳元素组成的金刚石坚硬而石墨很软 原子排列方式不同
D. 50 mL水和50 mL酒精混合后的体积小于100 mL 分子之间有间隔
+
+
光照
24.已知某两种物质在光照条件下能发生化学反应,其微观示意图如下(每种小球分别代表一种元素的原子): 下列说法正确的是
A.图中的反应物都是单质 B.该反应属于置换反应
C.图中共有4种物质 D.该图不符合质量守恒定律
25.下列做法正确的是
A.用甲醛溶液浸泡海鲜 B.用霉变的花生压榨花生油
C.室内放一盆清水预防煤气中毒 D.天然气泄漏应立即关闭阀门、开窗通风
①
②
③
④
26.右图表示的是纯净物、单质、化合物、含氧化合物、氧化物之间的包含与不包含关系,若最大圆圈代表纯净物,下列选项正确的是
A.①单质、③氧化物 B.②化合物、④氧化物
C.①单质、③化合物 D.②含氧化合物、④氧化物
27.下列叙述错误的是
A.实验室制取气体时,先检查装置气密性,再装药品
B.用托盘天平称量药品时,先使天平平衡,再称量
C.用CO跟 Fe2O3反应时,先通一会儿CO,再加热
D.加热KMnO4并用排水法收集O2,集满后先熄灭酒精灯,再将导管移出水面
28.科学家发现了新的氢微粒,它是由3个氢原子核(只含质子)和2个电子构成。下列说法正确的是
A.该微粒不显电性 B.该微粒的组成可用H3 表示
C.该微粒比一个普通H2分子多一个氢原子核 D.该微粒的相对质量比一个普通H2分子多3
29.甲、乙、丙三种物质各6 g放在密闭的容器中,充分反应后测得容器内只剩甲、乙两种物质,其中甲为16 g ,乙的质量是
A.2 g B.4 g C.10 g D.16 g
30.现有 H(+1)、Na(+1)、S(+6)、O(-2) 四种元素,当它们的化合价不变时,组成的化合物最多有
A.7种 B.6种 C.5种 D.3种
二、填空题
31.
2
8
(1)根据下图粒子结构示意图①~③中给出的信息,请回答:
O
6
6
2
8
+16
+11
2
+8
① ② S ③ Na+
①~③中非金属元素是_________,阳离子是_________。②所表示的粒子原子核外有____层电子,①和③表示的两种元素形成化合物的化学式为___________。
(2)为迎接北京2008年奥运会,市政府提出“还北京一片蓝天”的口号。为了这一片蓝天,采取下列措施能有效地提高空气质量。请你结合实际,再列举一条合理建议。
A.乘坐公交车,减少私家车出行。
B.____________________________________________________________________。
(3)成语“点石成金”比喻化腐朽为神奇,请你用化学知识说明石灰石不能变成黄金的道理是_______________________________________________________。
(4)“中水”是指生活污水经处理后达到规定水质标准,且在一定范围内可以再次使用的非饮用水。现有一种含碎菜叶、碎塑料薄膜和泥沙且有一定异味的生活污水(成分已做了简化)。运用你学过的知识解决下列问题:
①欲除去此污水中的菜叶、塑料薄膜和泥沙,可采用__________方法。
②通常使用______________除去污水中的异味。
③此污水经过去渣、除异味处理后,可用于冲厕所、洗车和灌溉绿地等,此污水处理后再利用的目的是____________________________________(合理即可)。
32.能源的开发和利用离不开化学。现代社会不仅对能源的需求量越来越大,要求也越来越高,我们已经进入第三次能源革命——多能源时期。
(1)沼气是一种比较清洁的能源。近年来农村大力推广使用沼气作燃料。沼气的主要成分是____________,它燃烧的化学方程式为______________________________________。
(2)氢能是理想的清洁能源。科学家正研究在使用催化剂和光照条件下将水分解得到氢气的方法,该化学方程式为_________________________???___________________________。
(3)绿色植物通过光合作用将能量转化(右图所示)。
其中物质X是_________,释放能量的化学方程式为
_____________________________________________。
33.下图是分子变化前后的示意图。图中“●” 表示氢原子,“○”表示氧原子。
上述变化的化学方程式为_____________________,它属于基本反应类型中的______反应;你从图中还可以看出的信息是____________________________________(只填一条即可)。
34.(3分)根据下列化合物与单质在一定条件下相互转化的关系回答:
化合物甲
化合物乙
单质x
单质y
(1)若乙的溶液为浅绿色,y是红色固体,
则x是___________。
(2)若乙在常温下是气体,则x是___________,
反应的化学方程式为__________________________________________。
35.(5分)以下是一些初中常见物质相互转化的关系图(有些条件已省略)。已知:常温下甲为液体,乙和E均为黑色固体,B是气体。请回答:
+ 乙
+ A
点燃
+ 稀硫酸
甲
A
C
D
B
E
D
(1)推断物质的化学式:甲是 、乙是 。
(2)D转化为C的基本反应类型是_______________反应。
(3)B、E转化为D的化学方程式为 。
(4)D转化为E的化学方程式为 。
三、实验题(共3个小题,共18分。)
36.(7分)根据下列实验装置图回答问题。
(1)写出标有序号的仪器名称:①__________,②____________。
(2)用装置A能制氧气,该反应的化学方程式为________________________________。
(3)用装置B能制O2或CO2,原因是_________________________________________,其中制O2的化学方程式为 ;用装置C能收集这两种气体,请写出其中一种气体验满的方法: 。
(4)化学实验常要处理尾气,下列尾气吸收装置中,既能吸收易溶尾气,又能防止倒吸的装置是______________(填装置的序号)。
① ② ③ ④
37.(6分)在研究二氧化碳的性质时,老师做了如图1所示实验,该实验说明二氧化碳具有_________________________________________________________________的性质。
(1)小聪和小明受到老师的启发,设计了如图2的家庭小实验,并推测了实验现象。两位同学都认为蜡烛会熄灭,因为________________________________________________。
但对图2中“两支蜡烛谁先熄灭?”的问题却有不同的看法:
小明认为低的蜡烛先熄灭,理由是 ;
小聪认为高的蜡烛先熄灭,理由是 。
(2)通过实验,证明小聪的看法是正确的,同时还观察到茶杯内壁变黑。你认为茶杯变黑的可能原因是__________________________________ ___________________________。
(3)由上述实验得到启发:从意外失火的高楼中逃生的正确方法是_________(填序号)。
①用毛巾捂住口鼻 ②低头弯腰沿墙迅速移向门外 ③打开窗户跳出
38.(5分)化学兴趣小组的同学们在实验室发现一些黑色粉末,是做“碳还原氧化铜”的实验时剩余的药品,于是对其成分进行探究。
【猜想与实验设计】小红猜测:黑色粉末是CuO。她设计了如下图所示的实验装置。
【实验步骤】取适量该粉末放入玻璃管中,打开K通入CO,排尽空气后加热。
现 象
A装置 黑色粉末逐渐变成红色
B装置 澄清石灰水变浑浊
【实验现象】
【实验结论】该黑色粉末是CuO。B装置中反应的化学方程式为_____________________。
【评价与反思】
(1)小芸认为该实验装置存在安全隐患,需要改进的是_________________________;
小芸还认为小红的实验结论是有欠缺的,她认为该黑色粉末的成分是_______________
___________________,理由是________________________________________________。
(2)小红经过反思,改进了实验并确认了黑色粉末的成分。请填写下表。
实验步骤 实验现象 实验结论
四、计算题
小刚发现养鱼师傅为解决鱼塘中氧气不足的问题,向鱼塘中撒一种淡黄色固体,其主要成分是过氧化钙(CaO2)。他查阅资料得知:过氧化钙与水反应,生成氢氧化钙和氧气。为测定淡黄色固体中过氧化钙的质量分数,称取20 g样品(样品中其他成分与水不反应)加入到足量的水中,共收集3.2 g氧气。请计算该样品中过氧化钙的质量分数。
㈢ 初中 期中考试的英语考试一般都考什么作文
一般都是很基础的题,平时都有练,考试就没问题,上乐冲刺官网,里面有很多的相关英语作文,你可以去看看~
㈣ 初三英语期中考试反思
在课堂上我们应该做到以下几点:1.静听。上课认真听讲,做好笔记,无论听、说、读、写都要使自己始终活跃。.2。积极参与。英语是实践性强的学科,要大胆地练习,敢说、敢读,积极回答老师提出的问题。课堂上积极发言对我们是大有裨益的,每一次的积极发言都是一次听说训练,可以使我们集中精力,对较难或者模糊不清的问题有一个明确的答案。经常举手发言也可以让老师加深对自己的印象。课堂上的听讲至关重要,老师在讲到重点时总有自己的语言或者体态特点,我们要善于观察和把握。3。勤动笔。把教师的重点及时迅速记在课堂记录本上,不过要处理好听课和记笔记的关系,不能顾此失彼。4。多开口。对于自己课堂不清楚的地方,下课后一定要及时询问老师,把问题解决在当天,不要顾及所谓的面子而不懂装懂,否则漏洞越来越多,最后造成英语成绩的不断滑坡。
学好外语还要记住以下几个原则
1.学习不中断,哪怕每天挤出10分钟也可以,早晨则是大好时机。
2.学厌了可变换一下学习方式或形式。
3.不要脱离下下文孤立地死记硬背。
4.随时记下并背熟那些常用的句型。
5.要敢于说外语,不要怕出错误,要请别人纠正,不要难为情,更不要泄气。
6.要坚信自己一定能够达到目的,坚信自己有坚强的毅力和学好外语的才能
㈤ 求九年级上册英语期中考试试卷(要含答案)
听力部分
一、根据所听的内容顺序,用1、2、3、4……将下列图片编号:%
二、听录音,选出所听到的内容:7%
( ) 1 A. right B. run C. read
( ) 2 A. skating B. swimming C. skiing
( ) 3 A. lesson B. learn C. lantern
( ) 4 A. chicken B. kitchen C. change
( ) 5 A. mouse B. house C. horse
( ) 6 A. let B. look C. lot
( ) 7 A. telephone B. elephant C. ruler
( ) 8 A. follow B. window C. yellow
( ) 9 A. any B. some C. every
( ) 10 A. you B. your C. go
三、找出与所听内容不同的部分:12%
四、根据所听问题选择正确的答句。10%
( ) 1 A. It’s four o’clock. B. It’s four yuan. C. There are four.
( ) 2 A. Yes, I can. B. Yes, I do. C. Yes, I am.
( ) 3 A. No, there isn’t. B. Yes, there is. C. No, there aren’t.
( ) 4 A. I like running. B. I can run. C. I can’t run.
( ) 5 A. Sorry. B. Thank you. C. OK.
笔试部分
一、判断下列每组单词画线部分读音是否相同,相同的打“√”,不相同的打“×”。6%
1. plate table ( ) 2. these bed ( )
3. after hat ( ) 4. class dance( )
5. some sofa ( ) 6. now house( )
二、英汉词组互译:10%
1. 在学校 2. 一些花
3. 住在 4. 唱歌
5. 买东西 6. each other
7. a large sitting-room 8. listen to
9. ride a bike 10. pumpkin lanterns
三、单项选择:12%
( ) 1. It is first day of the new term.
A. a B. an C. the
( ) 2. There a lot of trees in the garden.
A. are B. is C. has
( ) 3. How many TV are there in the building?
A. room B. a room C. rooms
( ) 4. a toilet in the building?
A. Are there B. Is there C. There is
( ) 5. The students are having their lesson.
A. english B. Music C. music
( ) 6. There is a football the bed.
A. under B. at C. in
( ) 7. I like , tigers and monkeys.
A. cat B. horse C. horses
( ) 8. Now boys and girls, follow , please.
A. I B. me C. she
( ) 9. Here a book for you.
A. is B. am C. are
( ) 10. Shall we go to the park? .
A. Yes, we can. B. Good idea. C. No, I like.
( ) 11. There is a map the world on the wall.
A. in B. at C. of
( ) 12. I don’t like .
A. play the guitar B. play guitar C. playing the guitar
四、连词成句:5%
1. can do what you
?
2. any are the there books on desk
.
3. door the behind what’s
?
4. pigs I much like very
.
5. see and let’s go
.
五、根据上下文,用适当的词完成对话,每空一词。6%
1. A:I can a puppet.
B: , too.
2. A:Can you a book your head?
B: Yes, .
3. Mike: Good morning, Tom.
Tom: . What do you like for pets?
Mike: I dogs. Do you like ?
Tom: , don’t.
六、抄写句子,并注意大小写和标点符号。10%
(编辑注:六题与四题形式上有些相似,建议合并或者增加一个问答句匹配之类的有上下文语境的句子测试题)
七、阅读短文,判断下列句子正误,正确的打“√”,错误的打“×”10%
That is a picture of a classroom. I can see some pencil-boxes and books in the desk. I can see a ball under the chair. There are two maps on the wall. The black board(黑板) is on the front(前面的)wall. Some student’s exercise-books(练习本) are on the teacher’s desk. Two brooms(扫帚)are behind the door.
( ) 1. That’s a picture of a classroom.
( ) 2. I can see pens and books.
( ) 3. I can see a ball on the chair.
( ) 4. There are two pictures or the wall.
( ) 5. There are some student’s exercise-books on the teacher’s desk.
附加题:10%
一、句型转换:4%
1. I can swim .(对画线部分提问)
2. There is a computer room in the building.(改为否定句)
3. There are some cards on the desk.(改为疑问句)
4. Here are some apples for you. (改为单数)
(编辑注:建议小学阶段尽量少用这种形式的句子测试题)
二、看图写作:6%
Yang ling’s bedroom
听力部分内容答案
一、根据所听的内容顺序,用1、2、3、4……将下列图片编号:
1. There is a piano in the music room.
2. There are some students in the computer room.
3. Mike’s football is on the desk.
4. I can see a telephone.
5. She has a new bed.
6. He can skate.
7. Can you dance? Yes, I can.
8. Do you like cks? No, I don’t.
9. I like hens.
二、听录音,选出所听到的内容
1. read 2. swimming 3. learn 4. chicken 5. horse
6. look 7. telephone 8. follow 9. some 10. go
三、找出与所听内容不同的部分
1. Listen to the song, please.
2. I can play the violin.
3. My mother likes reading.
4. My father can ride a horse.
5. Is there a slide in the garden?
6. What do you like? We like singing.
四、根据所听问题选择正确的答句
1. How much is it?
2. Can you play the guitar?
3. Are there any glasses on the table?
4. What do you like?
5. Here you are.
㈥ 初二英语下册期中考试卷
半期综合复习检测题
班级: 姓名:
一、词汇测试(10%)
A.用所给单词的适当形式填空
1.________(luck) I passed the exam this time.
2.Thank you very much for __________(invite) me to your party.
3.Do you know I had an ___________(usual) experience on Sunday.
4.How ___________(hard work) the children are!
5.The chicken is delicious,help ___________(you),my dear childen.
2.根据首字母或汉语提示完成单词
1.This sweater is too e__________.Can you show me a cheaper one?
2.Ben is a clever boy; he can speak three l____________ very well.
3.China is an old county with a long h_________.
4.We will play___________(对着, 反对) the team from No.1 Middle School.
5.I always get ____________(紧张) when the teacher asks me questions in class.
二、用所给动词的正确形式填空(10%)
1.We don`t know what_____________(do) the next morning.
2.Lucy,why not_________(go) to the cinema with us this afternoon?
3.My bike is broken,so I need__________(find) a bike shop to repair it.
4.Our English teacher is good at___________(play) football.
5.Do you enjoy__________(read) the books written by LuXun?
6.Tom ___________(not go) to bed until his parents come back.
7.If Lucy__________(go) to the cinema, I will go to the cinema, too.
8.I____________(listen) to the radio while my sister was playing the violin.
9.The Spring Festival___________(come),have you decided how to celebrate it?
10.It _________(take) me two hours to do my homework every day.
三、句型转换(10%)
1.I am thinking about which sweater I should buy. (同义句)
I am thinking about which sweater _________________________________.
2.Lily was very lucky,she bought the last ticket for the football match. (同义句)
Lily was___________________ to buy the last ticket for the football match.
3.Let`s go to the park. (变反意问句)
Let`s go to the park,_________________________?
4.He went to school after he had his breakfast. (同义句)
He____________________ to school _____________________he had his breakfast.
5. It seems that Tom is right. (同义句)
Tom _______________________________________ be right.
四、单项选择(15%)
( )1. He isn’t interested in basketball, he _________ a basketball fan.
A. can’t be B. mustn’t be
C. may not be D. needn’t be
( )2.---I’m sorry I____________ my exercise book at home.
---Don’t forget ____________it here tomorrow, please.
A. forgot; to take B. forgot to bring
C. left; to take D. left; to bring
( )3. Look! How heavy the rain is! You’d better_______________.
A. don’t go now B. stay here when it stops
C. not leave until it stops D. not to leave at once
( )4. When she was 22 years old, her dream to be a teacher_____________.
A. come true B. came true
C. came real D. come real
( )5. She was ill last week. But she is ___________ to go to school today.
A. well enough B. enough well
C. enough good D. good enough
( )6. Tom does his homework_______________ Lucy.
A. as carefully as B. so careful as
C. as careful as D. so carefully as
( )7. ---Would your younger brother go for a picnic this Sunday?
---If I go, ___.
A. So does he B. So will he
C. Neither will he D. Neither does he
( )8. Half of the class_____ all of the homework because some_____ really difficult.
A. are still doing , is B. is still doing , are
C. still do, is D. are still doing, are
( )9. I_____ he _____ go there next week.
A. suppose, can’t B. don’t suppose, can
C. don’t suppose, can’t D. suppose, would
( )10.The old man____ a traffic accident last week, however, she wasn’t____ hurt.
A. had, bad B. happened, badly
C. had, badly D. met, bad
( )11. John did badly in the exam. Kate did even ____.
A. worst B. more badly
C. worse D. also badly
( )12. ____number of students in our school don’t like English, and ____ number of them is over a third of the total.
A. A; the B. The; a
C. The; the D. A; a
( )13. ---We spent all our money because we stayed at _____ most expensive hotel in town.
---Why didn’t you stay at _____ cheaper one?
A. the; a B. a; a
C. the; the D. a; the
( )14. I saw him_________ football on the playground just now. A. to play B. playing
C. was playing D. play the ( )15. --- Her bicycle is broken.
--- Why didn’t you tell him_________ mine? A. use B. using
C. to use D. used
五、完型填空(15%)
Mr Evans lived in a city. He was a maths 1 three years ago. He taught well and his students 2 him. So he decided to work in the middle school all his life. But a terrible accident 3 his fortune (财产) .
One spring he took his class to 4 a place of interest. The children saw a lot of 5 things and had a good time there. But on their way to school, their 6 was hit by a truck because the young driver was drunk (喝醉). Five students 7 and more than half of the children were 8 in the accident. He didn't know how it had happened and was very 9 it and after he came out of hospital, he left the school and became a 10 . He tried his best to stop the drivers from breaking the traffic regulations (规则). He worked hard and was strict with the drivers. So they were afraid of him.
One afternoon it was very hot. Mr. Evans was 11 . He was standing at the crossing and watching the traffic. Suddenly he saw a 12 rushing towards the crossing. It ran so fast that it almost hit a man 13 a bike. He stopped it at once and saw a girl in it.
“ 14 your licence to me, madam,” said Mr. Evans.
The girl handed her bag to him and said, “Please look for it in the bag 15 . I can't see anything without glasses.”
( )1. A. worker B. teacher C. doctor D. farmer
( )2. A. liked B. wished C. helped D. answered
( )3 .A. beat B. won C. lost D. changed
( )4.A.build B. break C. visit D. find
( )5. A. terrible B. dangerous C. safe D. interesting
( )6 .A. bus B. train C. car D. ship
( )7 .A. left B. lived C. died D. fell
( )8. A. beat B. injured(受伤) C. touch D. stopped
( )9. A. sad about B. afraid of C. interested in D. worried about
( )10. A. soldier B. policeman C. bookseller D. cleaner
( )11. A. in the corner B. at home C. on ty D. in the office
( )12. A. runner B. policeman C. player D. cleaner
( )13. A. riding B. selling C. buying D. making
( )14.A.Throw B. Show C. Lend D. Copy
( )15. A. you B.I C. yourself D. myself
六、阅读理解(30%)
A.
Books about how to do things are very popular in America today. There are about four to five thousand kinds of books with the name “How to……”. One book may tell you how to make more money. Another may tell you how to save or spend it. And another may tell you how to give your money away.
Some “How to ” books tell you how to choose a way of making a living and how to succeed in it. If you fail, you can buy a book called “How to Turn Failure(失败) into Success”. If you never make any money at all, you may need a book called “How to Live on Nothing”. If you’re unhappy with your life, you can read “How to Love Every Minute of Life.”
( )1. “How to ……” books are popular because they ______.
A. are interesting
B. can help people
C. are strange(奇怪)
D. can make people rich
( )2. If you want to have much money, you can buy______.
A. How to Live on Nothing
B. How to Love Every Minute of Life
C. How to Make a Million
D. How to Turn Failure into Success
( )3. Which of the following is the best title for the passage?
A. How to B. “How to” Books
C. Another Kind of American books D. Interesting Books
( )4. The underlined word “spend” means______.
A.挣 B. 花 C. 度过 D. 存
B
Can you think of a sentence and in it “AND” appears(出现) five times, without any words in between? There is one at the end of the story.
There was once an inn(客栈) called “THE HORSE AND CART(马车)”. It had a sign outside it. There was a picture of a horse and a cart on the sign. The sign was getting very old, so the owner of the inn decided to make a new one. He went to a painter and asked him to paint one and to write “THE HORSE AND CART” on it in large letters. A few days later, he went to see how the painter was getting on with it. He liked the picture of the horse and cart very much, but he didn’t like the words at all. He said to the painter, “No! There is too much space between HORSE and AND and And and CART!”
( )5. What is on the old sign?
A. the words “THE HORSE AND CART”
B. A picture of a horse and a cart
C. A picture of an inn
D. A picture and the words “THE HORSE AND CART”.
( )6. How many ANDS did the painter write on the new sign?
A. Only one B. Four C. Five D. Two
( )7. The words on the new sign were like this_____.
A. THE HORSE AND CART
B. THE HORSE AND CART
C. THE HORSE AND CART
D. THE HORSE AND CART
( )8. Which of the following is right?
A. There was a horse and a cart outside the inn.
B. The owner wanted to made a new sign himself.
C. The painter drew the picture of a horse and cart.
D. The painter only wrote “THE HORSE AND CART” on the sign.
C
Mr White works in an office. One day, when he was having lunch, a friend came to visit him. They were happy and talked a lot. He had a look at the clock on the wall. It was time to go to office. He had to say good-bye to his friend and left. It was raining hard and the streets were wet. He drove too fast to see the red lights. And he couldn’t stop his car and hit a car in front of his. An old man got off and called out angrily, “What are you doing? Do you want to hit me to death?”“I’m sorry, sir,” said Mr White. “Please drink a little, then you’ll be warm.”The old man drank some wine and became happy. He asked, “I’m feeling much better now. Why don’t you drink any?”“I can’t drink anything now, sir,” answered Mr. White. “I’m waiting for the policeman’s coming. Only drunkards(醉鬼) cause accidents, you know!”
( )9. Mr. White drove too fast because_____.
A.he was happy that day
B.he was good at drinking
C.there were few cars in the street
D.he was afraid to be late
( )10. Mr. White hit the car because_____
A. he didn’t see it
B. it was raining hard
C. he couldn’t stop his car
D. he couldn’t drive at all
( )11. Mr White gave a bottle of wine to the old man_____.
A. to shift the blame onto(委过于) him
B. to make him happy
C. to make him warm
D. to leave there before the policeman came
( )12. At last, _____.
A. the old man felt much better
B. the old man was friendly to Mr. White
C. Mr. White drank some too
D. Mr. White fooled(愚弄) the old man
D
A young man could not sleep well every night. He was very worried. One day, he went to see the doctor. The doctor looked over him carefully. But there was nothing wrong with him. The doctor told him to count from one to ten again and again “Keep doing it till you fall asleep.” the doctor said.
After a few days, the young man came to the doctor again. But to his surprise, the doctor found the young man even worse than before.
“Didn’t you count as told you?” the doctor asked.
“Yes, I did.” the young man said. “But every time when I reached eight, I could not help (情不自禁地) jumping from bed.”
“But why?” the doctor wanted to know. The young man answered, “I am a boxer(拳击手)”.
( )13. The doctor told him to keep_____ till he fell asleep.
A. counting B. reading C. sitting D. jumping
( )14. When the young man came to the doctor again, he _____.
A. was fine B. looked well
C. was worse than before D. was better than before
( )15. The man could not help jumping from his bed when he reached eight because _____.
A. he was a teacher B. he liked jumping
C. he didn’t want to sleep D. he was a boxer
七、翻译(10%)
1.我的长裤和你的长裤有相同的颜色。
My trousers have________________________as yours.
2.史密斯先生把汤姆当作自己的孩子。
Mr Smith always______________Tom ________________ his own child.
3.我的父母从来不打架。
My parents never_______________each other.
4.下周我们要坐飞机到香港去度假。
Next week we will______________HongKong_________________our vacation.
5.你的衣服过时了。
Your clothes are_________________________.
6.他发现做一个专业运动员很难。
He found_________________________ a professional athletes.
7.看上去无人知道发生了什么事。
_______________________________that no one knows what has happened.
8.他是一个很难相处的人。
It`s difficult___________________________him.
9.他努力学习以便通过考试。
He works very hard_____________________________ he can pass the exam.
10.你必须多锻炼保持自身身体健康。
You must do more exercise to ___________________.
(六)半期综合复习检测
一、A.1.Luckily 2.inviting 3.unusual 4.hard-working 5.yourselves
B.1.expensive 2.languages 3.history 4.against 5.nervous
二、1.to do 2.go 3.(to)find 4.playing 5.reading
6.won`t 7.goes 8.was listening 9.is coming 10.takes
三、1. to buy 2.lucky enough 3.shall we 4.didn`t until 5.seems to
四、1--5ADCBA 6--10ABABC 11--15CAABC
五、1--15 BADCD ACBAB CDABC
六、A.1--4 BCBB B. 5--8DAAC C. 9--12 DCAD D: 13--15 ACD
七、1.the same colour 2.think of as 3.fight (with) 4.fly to for 5.out of style
6.it difficult to be 7.It seems 8.to get on/along with 9.so that 10.keep yourself healthy
㈦ 初中的英语期中期末考试卷子很难怎么办很多不认识的单词,月考英语卷子出的课本上的题,很简单,能考
背单词是学习语法、句子、口语、听力、阅读、写作的基础部分,只内背单词相当于你容积累了很多砖,造好房子还需要其他东西,当然如果没有砖也造不了房子,所以不背单词也是不行的。
对于背单词,不要死记硬背中文意思,背的时候多看例句,试着多造句子,这样才能明白单词的用法,也可以尝试谐音法,词根词缀法,头脑风暴法,自己编顺口溜等,可以下载个单词风暴电脑软件跟着记,还可以自动提醒你复习。有一定基础的话试着用简单的英语去解释新单词,这样有助于培养英语思维并更好地理解单词意义,平时多多多看英文材料,能进一步扩大词汇量和增强语感。
㈧ 关于初三期中考试
元测试(unit8-10)
初三年英语精选单选题错题100题
初三英语Units1--2
初三英语单元检测 (Units1-2)
初三英语模拟试卷
初三英语模拟试题2
初三英语语法测试
初三英语月考试题
初三英语试卷
初中英语介词练习
初中毕业会考
初三单元测试
九年级学业阶段性评估(Unit1-5)
初三第一学期第二次月考
第一学期期中考试试卷
第一学期期中考试试卷2
九年级英语阶段检测试题
初中英语宾语从句语法专项精选试题
初中英语素质教育阶段评估检测卷(Units1—18)
初中英语素质教育阶段评估检测卷(Units1—2)
初三英语期中检测题2
初三英语期中检测题1
初三英语期末测试题5
初三英语期末测试题4
初三英语期末测试题3
初三英语期末测试题2
九年级英语第一次知识测试
初三英语期末测试题1
初三英语Unit18试卷4
初三英语Unit18试卷3
初三英语Unit17试卷3
初三英语Unit16试卷2
初三英语Unit15试卷2
初三英语Unit14试卷2
初三英语Unit13试卷2
初三词汇练习
初三英语Unit12试卷4
初三英语Unit12试卷3
初三英语Unit11试卷3
初三英语Unit11试卷4
初三英语Unit11试卷2
初三LESSON 37测试
初三英语Unit10试卷2
初三英语Unit10试卷3
初三Lesson 33测试
初三英语Unit9试卷3
初初三英语Unit9试卷2
初动词的被动语态练习1
初三英语单元检测题(UNIT 8—9)
初三英语Unit7试卷5
初三英语Unit7试卷4
初三英语Unit7试卷3
初三英语Unit7试卷2
The homework of Lesson 21
初三英语Unit6试卷3
初三英语Unit6试卷2
初三英语Unit5试卷7
初三英语Unit5试卷6
初三英语Unit5试卷5
初三第3单元同步验收练习题
初三英语综合练习(四)
初三英语综合练习(五)
九年级新目标英语第11单元检测题(附答案)
九年级新目标英语第13单元测试题(附答案)
九年级新目标英语第15单元测试题(附答案)
课程改革实验区初中毕业学业考试
中学初三调研考试
综合测试
英 语 模 拟 试 卷
初三英语Unit5试卷4
初三英语4-6单元测试题
Unit 3 Make our world more beartiful
初三英语Unit3试卷2
初三英语Unit3-4试卷2
初三英语Unit2试卷6
初三英语Unit2试卷5
初三英语Unit2试卷4
初三英语Unit2试卷3
初三英语Unit1试卷6
初三英语Unit1试卷5
初三英语Unit1试卷4
初三英语Unit1试卷3
初三英语Unit1-12试卷5
初三英语Unit1-12试卷4
英语九年级上册月考试题
初三英语Unit1-12试卷3
初三英语Unit1-12试卷2
初三英语Unit1-12试卷1
初三英语期中试卷
初三级11月月考英语科试卷
初三英语Unit1-6试卷6
初三英语Unit1-6试卷5
初三英语Unit1-6试卷3
初三英语Unit1-6试卷2
初三英语Unit1-6试卷1
初三英语Unit1-3试卷4
初三英语Unit1-3试卷3
初三英语Unit1-3试卷2
初三英语Unit1-3试卷1
初三英语Unit13-16试卷
Unit 2测试题
初中英语词汇比赛试卷
初三英语总复习检测题
第1单元同步验收练习题
第五单元英语“四位一体”同步验收练习题
初三第11单元同步验收练习题
第十五单元英语“四位一体”同步验收练习题
初三第14单元同步验收练习题
初三第13单元同步验收练习题
初三第17单元同步验收练习题
第十七单元英语“四位一体”同步验收练习题
初三第16单元同步验收练习题
初三第12单元同步验收练习题
第十二单元英语“四位一体”同步验收练习题
初三第10单元同步验收练习题
初三第18单元同步验收练习题
第十八单元英语“四位一体”同步验收练习题
小学一年级试题 小学二年级试题 小学三年级试题 小学四年级试题 小学五年级试题
小学六年级试题 初中一年级试题 初中二年级试题 初中三年级试题 高中一年级试题
高中二年级试题 高中三年级试题 2006中考试题 2006高考试题
http://hi..com/%C4%CF%C9%B3%C8%BA%B5%BA3hk%5F/blog/item/f32f2c088d8ef930e92488dc.html物理试卷
总分150分,考试时间100分钟
(考生注意:本次考试分试卷与答卷两部分,请同学们将全部答案做在答卷纸上,谢谢)
一. 选择:(2分×14=28分)
1. 下列工具在使用时属于费力杠杆的是
A.定滑轮 B.钓鱼杆 C.剪铁皮的剪刀 D.撬棒
2. 工厂为了搬运一个笨重的机器进人车间,工人师傅设计了下图所示的四种方案(机器下方的小圆表示并排放置的圆型钢管的横截面),其中最省力的方案是
3. 小明用30N的水平力,将一个重10N的球踢出,球在水平地面上滚动50m才停下,则在球滚动过程中,小明对球做的功为
A.0J B. 1500J C.500J D.不好判断
4. 登楼梯比赛时,小明从底楼匀速登上五楼,共用了16 s,小明登楼时做功的功率最接近于
A.5000 W B.500 W C.50 W D.5 W
5. 下列过程中弹性势能转化为动能的是
A.雪橇从山坡上滑下 B.炮弹从炮口斜向上射出,又落到远处地上
C.玩具弹簧枪将“子弹”射出去 D.小孩坐在秋千上,在妈妈推了一次后,自己荡着
6. 内燃机在工作过程中将内能转化为机械能的冲程是
A、吸气冲程 B、压缩冲程 C、做功冲程 D、排气冲程
7. 如图1所示,闭合开关S时,灯泡L1、L2都不亮。用一段导线的两端接触a、b两点时,两灯都不亮;接触b、c两点时,两灯都不亮;接触C、d两点时,两灯都亮。则
A.灯L1断路 B.灯L2断路 C.灯L2短路 D.开关S断路
8. 教室里有8盏相同规格的荧光灯、4只开关,每1只开关控制2盏灯。天黑时小明闭合所有开关,却发现只有7盏灯亮了起来,则这8盏灯的连接方式是
A.并联 B.串联 C.串联、并联均有可能 D.无法判断
9. 炎炎烈日同时照晒着旱地和水田,与水田相比,旱地的温度升高得快,原因是
A.旱地能吸收到更多的热量 B. 泥土的分子运动速度较小
C.水田能吸收到更多的热量 D. 水的比热比泥土的比热大
10. 在“①天气真热;②物体吸热;③摩擦生热;④热不可耐”等中,“热”表示“温度”的是
A.①② B.①③ C.②③ D.①④
11. 一杯70℃的热水在房间内冷却到20℃时放出的热量大约是
A.几百焦 B.几千焦 C.几万焦 D.几十万焦
12. 由于一个滑动变阻器的最大阻值不够大,某同学将两个相同的滑动变阻器串联起来使用,如图,如果把两个接线柱接入电路中,要使两个滑动变阻器阻值最大,滑片P1、P2的位置应同时满足:
A.P1在最右端,P2在最左端B.P1在最左端,P2在最右端
C.P1在最左端,P2在最左端D.P1在最右端,P2在最右端
13. 下列将电能转化为机械能的是
A.发电机 B.电视机 C.日光灯 D.电风扇
14. 如图2所示的电路中,要使灯L1、L2并联发光,则应只闭合开关
A.S1 B.S1、S3 C.S2、S3 D.S1、S2、S3
二. 填空:(每空1分,共25分)
1. 换算以下单位:
360W=_________kW=________MW, 33.6KΩ=____MΩ=_______Ω,
2. 把重为8牛和13牛的物体分别挂在杠杆支点的两侧,杠杆平衡时,两力臂之比为_______。
3. 滑轮实质上是变形的杠杆,系在旗杆的上端,升旗用的滑轮是______滑轮,能改变力的方向;装在起重机上,与重物一起运动的滑轮是_______滑轮,能省力。
4. 两台机器功率之比为3:2,则做相同的功时所用时间之比为_______。若用相同时间,则所做之比为_______。
5. 图3所示,取一张名片大小的硬卡纸,轻轻对折后开口,套上橡皮筋。若将图中卡片反过来放在水平的桌面上,用力向下压卡片纸,观察发现橡皮筋的形变_______,________ 能增加;迅速松开手,观察到的现象是___________________________ 。
6. 请画出下列各图中电器的电路符号:
(1)_____ (2)_____ (3)______
7. 一台单缸四冲程汽油机的飞轮转速是2400r/min,则汽油机每秒钟完成____个冲程,做功___次。
8. 一瓶酒精的比热容为c,热值为q。现将酒精倒去一半,再使它的温度降低一半,则它的比热容为______,热值为______。
9. 一位同学设计了一个汽车油量表的电路如图3所示,弧形电阻AB和指针P组合在一起相当于一个滑动变阻器,当油箱里的油面上升时,滑动变阻器的电阻变_____,电流表的示数变_____。
10. 洒水车沿水平大道匀速行驶,将水洒向路面,在此过程中,它的动能________,机械能________。
11. 如图5所示,重150N的物体与地面间的摩擦力是60N,为使物体匀速移动,必须在绳端加F=25N的水平拉力,则滑轮组的机械效率约为______,若物体移动速度为0.2m/s,则1min拉力做的功是______J。
三. 作图与实验:(2+2+2+2+10=18分)
1. 在图6中,画出作用在“开瓶起子”上动力F1的力臂和阻力F2的示意图。
2. 用图7的滑轮组提升重物,要使所用的力最小,请用笔划线代替绳子在图中画出绳子的绕法。
3. 在图8中的两个○中填入电流表或电压表的符号,使两盏灯均能发光
4. 根据如图9所示的实物连接图,画出它的电路图。
5. “研究杠杆的平衡条件”的实验如图10所示,回答下列问题:
(1) 杠杆两端的调节螺母,是起调节杠杆______的作用的。
(2) 实验前先要调节杠杆两端的螺母,使其在水平位置平衡,这是为使杠杆所受的_____通过支点,从而可以不考虑杠杆的重力对其转动的影响。如果某同学做实验时发现杠杆左高右低,应将杠杆左端的螺母向___调;或将右端的螺母向__调。
(3) 调节好以后,仍要使杠杆在水平位置平衡,是为了_______。如杠杆不在水平位置平衡时,应通过调节钩码的_____或_____来实现,而不能再调节______。
(4) 通过实验,得出的结论是:______________。
四. 计算:(4+6+4=14分)
1. 一同学在家里帮爸爸安装一只临时电灯照明,当绳子AB使杠杆处于图11所示位置时,AB=2m, OB=1.5m,若绳子AB拉力是30N,则灯的重力是多少?
2. 工人利用如图12所示的滑轮组提升重物,不计绳重和摩擦。
(1)若工人用250N的力能将重400N的物体竖直向上匀速提升2m,则拉力F所做的功是多少?
(2)该滑轮组此时的机械效率。
(3)若用此滑轮组将重900N的物体竖直向上匀速提升2m,求拉力F在这一过程中所做的功。
3. S195型柴油机的部分技术规格如下表所示
汽缸数 汽缸直径 额定功率 转 速 燃油消耗率 冷却方式
1 95 mm 8.8 kW 2000 R/min 0.27 kg/3.6×106J 蒸发水冷
其中,“额定功率”是指柴油机正常工作时对外所做机械功的功率;“燃油消耗率”是指柴油机正常工作时,每输出3.6×106J的能量柴油机所消耗柴油的千克数。已知柴油的热值为3.3×107J/kg,水的比热容为4.2×103J/(kg•℃)。
(1)若柴油机的水箱中贮有10kg冷却水,当水的温度由20℃上升到40℃时,这些水所吸收的热量是多少?
(2)已知柴油机的效率η= ×100%(式中W为柴油机在某段时间内对外所做的功,Q为它在这段时间内所消耗的柴油完全燃烧所产生的热量),则该柴油机正常工作时的效率约为多少?
五. 应用:(2+3+4+6=15分)
1. 刻度尺、温度计,量筒、弹簧测力计、电流表和电压表是物理实验中的常用仪器.通过比较可以发现,这些仪器具有—些共同的特点.例如它们都有一定的量程.
上述仪器还有的共同特点是(只要求写出2个):
(1)__________________________________________________;
(2)__________________________________________________。
2. 现有小灯泡L1和L2,开关S1和S2,电源和导线若干,请在虚线框内设计一个电路图同时满足下列要求。
(1)当S1断开时,L1和L2都不亮。
(2)当S1闭合,S2断开时,L1、L2都亮。
(3)当S1、S2都闭合时,L1亮、L2不亮。
3. 给你一根米尺(重可以忽略不计)和一只弹簧测力计(量程为5N),请利用它们作为主要的测量仪器,测量一个重约为8N的物体的重。请写出实验还需要的添加的器材以及实验的方法。
4. 如图,在一根横跨河流两岸的硬塑料管内穿有三根完全相同的电线。为了辨别哪两个线头为同一根导线的两端,可以用图示的测通器来测试,其操作过程如下:
⑴连接A和B,将测通器的m连接在D上。当n连接F时小灯泡发光,连接E时小灯泡不发光。由此可以确定_______为同一导线的两端(填字母,下同)。
⑵为了弄清另两根导线的两端,可连接A和C,测通器的一端必须与______相连时,另一端只需接触剩下的两根导线中的一根,如果灯亮,则说明________________。