大学英语1在线作业试题有答案

《大学英语（1）》在线作业试题有答案

一、单选题

1.____________that we went outing.

weather so fine

fine the weather is

the weather was fine

fine was the weather

a number of disagreements with the mittee, the chairman decided to_____.

3.―You have lovely children. ―_______________.

, no, no. They are not

, no, no

”re talking too much

such dry weather, the flowers will have to be watered if

they____________.

survived

to survive

survived

survive

5.―I was worried about chemistry, but Mr. Brown gave me an

A! ―_________.

”t worry about it

! That”s a difficult course

Brown is very good

luck to you

army spokesman stressed that all the soldiers had been

ordered____________clear

warnings before firing any shots.

issue

issued

have issued

be issued

were no tickets _________ for Sunday”s performance.

shirt needs____________ . You”d better have it done today.

iron

ironed

9.―It”s cold in here. Do you mind if I close the door? ―_______. pleasure

, please

course not

you

sooner____________to bed than he heard a knock at the door.

he gone

had gone

he go

went

let me sit down; I'm ___.

down

off

out

away

does a lot of housework every evening, but now he ____________his schoolmates with their lessons.

helping

helped

can go when the ground____________.

drying

dried

the ground ____________ a dead snake.

lie

id

y

”s the only child in her family, but they didn”t really _______ her.

class ____________ over, we had a ____________discussion.

... heat

... heated

... heating

... heated

found a pile of gold at the entrance. There was____________ more inside the

cave.

of

18.―Excuse me, but can you tell me the way to the airport? ―_______. ”t ask that

, I”m a stranger here

, I can”t say that

, you”re driving too fast

19.―Do you think I could borrow your dictionary? ―_________.

, you may borrow

, go on

, help yourself

doesn”t matter

should make _______ your house or flat is secure.

when the plan failed____________ his mistakes.

he realize

he realize

realized

realizes

used to have a _____________ of stampcollecting but he has given it up.

had to shout____________above the sound of the music.

herself hear

make herself hear

herself heard

make herself heard

____________more than 300,000 kinds of plants on the earth.

existing

Red Army seized the land and _____ it to the poor peasants.

can”t ___ one to change the habits of a lifetime in a short time.

_____ of yourself that you see in the mirror is produced by the reflection of

light.

admired my classmate Lisa very much. ______ her prettiness, she was smart and

helpful.

for

for

from

spite of

”d like to __________ him to you for the job. He is a very clever and

industrious boy.

don”t know whether you happen____________, but I am going to study in the

this September.

be heard

be hearing

hear

have heard

President____________ went to see the flood-stricken areas.

said

didn”t fancy ___ out alone.

go

going

____ an entry visa is very difficult now.

for

for

in

in

”m afraid I can”t finish the work ____________to help me.

you will e

you e

you will e

you shall e

said that ____________.

had finished writing the position the night before

had finished writing the position last day

finished writing the position on the last night

finished writing the position before the night

____________ whether he will go on with his study at the university. ”t been decided

”t decided

”t decided

”t decide

wife said in her letter that she would appreciate ____________ from you

sometime.

have heard

hear

hearing

is not my bike．It”s ____________.

”s

Mary

bike of Mary

were silly not ____________your car.

lock

have locked

locked

factory ____________ nearly 50 years ago.

been built

built

built

built

could do nothing but____________for the bus____________.

... to e

... e

... ing

... came

aren”t using this typewriter, ____________ ?

you

you

you

you

party is the____________ activity I want to take part in.

____________ his work, he came to help me with my English.

finished

been finished

”ve enjoyed____________ to talk with you.

be able

able

been able

being able

the problem ____________ , we are getting along even more smoothly. settle

be settling

the police ing, away____________ .

thieves ran

the thieves run

the thieves

the thieves run

didn”t see the minister,____________ did I see the secretary.

friend ____ to visit the Great Wall, too.

not plan

not

plans

remember____________him____________the bike needed____________.

... saying ... to repair

hear ... say ... to repair

... say ... repairing

hear ... saying ... to be repaired

25．洗澡时淋浴温暖而舒适的室内温人的体温是39 ℃度是℃D.80℃6.下列温度值最接℃，温度计的工作原理是利用液体的__热胀冷缩__。．摄氏温度规定，在标准大气压下，沸水的温度为近实际的是A.120℃．让人感觉B.100．健℃晨，草叶上出现的晶莹剔透的露珠属于

固态变为液态康成年现象．晒在太阳下的湿衣服变干是气态变为液态精很快现象．擦在皮肤上的酒变干是液态变为气态C.90现象．初冬树上的霜是液态变为固态现象．下面是四位同

学用温度计测水温的实验操作过程，其中正确的是所示方)4．在测量水的温度时，甲、乙、丙三位同学按如图法读数，正确的是__乙接近．下列温度最23 ℃的是__，．人体的正常体

水的温温．北方冬季的平均人感觉气温．让温暖、舒适的房间温化。下度．冰水混合物的温度．当温度发生变化时，物质的状态通常会发生变列现象中物态变化判断正确的是度是

__42__．初秋的早制成的．在使用该温度计测量物体温度时，可以离开被测物体读数10．物质通常有三种状态：__固态、液

__态和__气__态。在个标准大气压下5 ℃的酒精、氢气、铁三种物质中，有固定的体积和

形状的是__铁__，既没有固定的体积又没有固定的形状的此时的示数约为确的是21℃9.如图所示是实验室常用温度计，关于它的说法正是__．该温度计的示数为39 氢℃．该温度计的分度值是0.1 气℃．常用温度计是根据固体热胀冷缩的原理__。11．把①糖、②醋、③白雾、④碗、⑤变化与的适宜水温是60 ℃第一节物态计测液温度．在一个标准大气压下盐水的凝固点是0 ℃．下面分别表示几位同学在练习用温度体的温度实验中的做法，正确的是勺

子)8．如图所示的温度计，关于它的说法正确的是、．该温度计是根据固体热胀冷缩的原理

制成以离开的．在使用该温度计测量物体温度时，可被测物⑥体读数．该温度计的量程是味精20℃～、100．该℃温度计－－10℃14.科学家发明了一种世界上最小的温度计碳纳米管温度计。研究人员在长约10米，直径10米的碳纳米管中充入液态的金属镓，当温度升高时，管中的金属镓会膨胀，通过电子显微镜就可读出温度值。其测量范围为冷的冬天，河面上结了一层厚厚的冰，若冰面上方气温是－正确的10℃，那么，下列说法中是18 ℃～．冰的上表面为－490 10℃，下表面是℃，且精℃．整个冰层的温度都是－确度高10，可用℃．整个冰层的温度都是于检查电子线℃路．冰层下

表面的温度是－．在寒2 某地某里的平__⑦⑧__⑦水蒸气、⑧二氧化碳、⑨干冰按物质的

状态进行分类：属于气态的是；属于液态的是__②③__；属于固态的是__①④⑤⑥⑨__。均填序号)12．气象学均气温是一日当中的时、时、14时、20时这四个时刻气温的平均值，若日这四个时刻的气温如图所示，则此地的最高气温是__5 ℃__，最低气温是－℃__，一天的温差为_7 ℃__，平均气温是__1.25 ℃。13)A．碳纳米管的体积在18 ℃～490 ℃之间

随温度变化很小，可忽略不计．金属镓的熔点很低，沸点很高．金属镓的体积在18℃～490℃之间随温度变化很小，可忽略不计．金属镓的体积在18℃～490℃之间随温度变化比较均匀15如图所示，甲是体温计，乙是实验室用温度计，它们都是利用液体__热胀冷缩__的性质

制成的。可用来测沸水温度的是__乙__；没有甩过的体温计的读数是38℃，用两支这样的

体温计给两个病人测体温，如果病人的体温分别是37.℃和38.6℃，则这两支体温计的读错误的是否异常毛细血管的温度等许多方面。根据以上信息，你认为下列推测是数将分别是

__38__℃和__38.6__℃。16．如图所示是小明同学设计的一个气体温度计的示意图。瓶中装的是气体，瓶塞不漏气，弯管中间有一段液柱。(1)这个温度计是根据__气体__的热胀冷缩

来测量温度的。(2)将此装置放在室内，温度升高时液柱向__左__(选填左或右移动。(3)若放到冰水混合物中，液柱处的刻度应标__0__℃。(4)该温度计测量温度时__

．露、雾、冰．冬天晾在室外的湿衣服里的水会结．露、雾、白气成冰，但是冰霜、

露、雾、冰、“白气”中，由液化而形成的是冻的湿衣服也．霜、雾、白气能晾干，．霜、露、白气源丰富过程伴随着水的物态变化过程．水循环按照固态→液态→气态的固定顺序循环进行．地球上的淡水大约占地球总水量的3%，淡水资．大量开采地下水，对环境不会造成损害，可以解决部分地区饮水问题的是循℃，把它放17受到大气压的影响．有一只刻度均匀，但实际测量不准确的温度计，把它放在冰水混合物中，示数是4 ℃；在标准大气压下的沸水中，示数是94 ℃。把它放在某种液体中时，示数是22 则该液体的实际温度是__20 ℃__，当把该温度计放入实际温度为℃40的温水中时，温度计的示数为___40 ℃__。第四节地球上的水．水是生命的乳汁、经济的命脉，是自然界奉献给人类的宝贵资源。下列关于地球上的水循环和水资源，认知正确．)A．水循环的选会__(填会或不会”

化现象．霜的形柜里的樟脑丸逐渐减壶口上方看到的白气是水蒸少是汽下列有关物态变化的叙述中正确的是气度下都．蒸发和沸腾在任何温．衣能发生河中的冰逐渐消融——汽．烧化．盛夏，剥开包装纸后冰棒会冒“白气”——熔化．深秋，清晨的雾在太阳出来后散去——水时在液化．严冬，堆起的雪人逐渐变小——升华列她们序号过程；④放入衣箱中的樟脑球变小的过程；③冬天室内的水蒸气在玻璃窗上形成“冰花”的出炉的钢水变成钢锭的过程。其中属于凝华的是__③__，属于吸热过程的是__①②__填写。5.有一天，雨、露、冰、雪四姐妹在一起争论自己的出生由来，谁也不认同谁。下的说法中，你认为正确的是．冰说)A．雨说：我是水汽化而来．露说：我是水蒸气凝华而来：我是水凝固而来．雪说：我是水升华而来6.对下列现象的成因解释正确的是7.．早春，上的水了这是因为衣服上的冰升华成水蒸气__。．有下列物态变化：①洒在地慢慢变干的过程；②

中．积雪放热熔化成水归入大海11.英国科学家研发出一种激光橡皮。在激光照射下，纸张上的黑色碳粉直接__升华__填物态变化中的水吸热蒸发成水蒸气升腾至空名称为高温碳蒸气，字迹消失；经过特殊冷却装置，高温碳蒸气又直接__凝华__成碳粉。这样，废纸和碳粉重新得到了利现象，需要需要吸吸热．夏天会看到冰棒周围冒白气，是汽化现象，用，可热．秋天的早晨花草上出现小露珠，是液化现象，需要放外飘起热．寒冷的冬天室了雪花，是凝固现象，需要放热10．关于自然界的水循环，下列说法中正确的是有效地．水蒸气在高空遇冷吸热液化成小节约水珠．冰山上的积雪只能先熔化，再蒸发成水蒸气升腾至是量成是凝华现象，放出热8.以下常见的物态变化实例中，放热的空中．江．春天，冰雪夏天，消融．积水干态变化涸．秋天，草木上出现了霜．冬天，冰冻的衣服变干9.下列有关物的判断，正确的是河湖海上的酒．擦在皮肤精很快变干，是升华℃以下，晚气温如迅速降到中的浮尘上，形成了雾。冬天，夜时，水蒸气会__液化__成小水珠，附着在空气成水的过程中需要__吸__热。15．阳光照射下，海洋、陆地上的水会不断地__汽化成水蒸气；夜间气温降低蒸气会。逐渐变温度急剧下降，空气中的水蒸气遇冷__凝华__成小冰粒，冰粒大而下落，下落过程中遇到暖气流就__熔化__成水滴，水滴降落就形成了雨均填物态变化名称)14．农谚说霜前冷，雪后寒，其中蕴含的道理是：气温低的时候水凝华形成霜，雪熔化形__二氧化现实。技的发吸，升华区年平态变化面有小．资源并保护环境。12夏天，从冰箱中取出饮料瓶，可观察到瓶子表水珠，擦干后很快又形成，这个过程中发生的物是__液化__；南极地均气温是－，但这25℃，降水量很小里的空气却很湿润，这是由于冰发生了升华现象过程需要__吸热__选填热或放热。13．随着科展，过去呼风唤雨的神话已成为人工降雨的原理是用飞机在空中喷洒干冰固态碳，干冰在空气中迅速吸热__升华，使周围空气100℃。请你根据上述资料分析说明小明的猜想是错误的原因：__热水温度低于碘的熔点，碘不可能熔化__。(3)为了进一步探究此类现象，小明在试管中放入适量温水，然后放入一小块干冰固态二氧化沸点是碳，此时观察到水中有大量气泡产生，同时水面上有大量白雾。水中大量的气泡是由__干冰升华吸热__形成的。水面上大量的白雾是由__水蒸气遇冷液化__形成的17．有霜的季到。为，因为中，小_(试管。察

到试验中，内侧的__上会形成一层冰花，这是水蒸气凝华__而成的，这层冰花在你家窗户玻璃__内侧__(选填外侧或。16．某同学在探究物态变化的实在试管中放入少量碘。塞紧盖子放入热水中，观管中固态碘逐渐消失，变为紫色的碘蒸气并充满(1)此过程固态碘发生的物态变化是升华填物态变化名称。(2)在上述实验明同学猜想：固态碘是先变成液体，再变成气体速度太快，液态碘出现的时间太短，因而没有观察验证猜想，他查询了一些小资料：碘的熔点是113.5℃；碘的沸点是水的184.4℃；你家窗户的玻璃)A．钢水浇铸成火车轮．化？倒在地上的水一会儿变干了把盛有酒精的瓶口盖严．给湿头发吹热风．下列哪一种现象属于液要陈述述猜想，请简理由第三节汽化和液．下列措施中，能使蒸发加快的是盖地膜)A．给播种后的农田覆．把新鲜的蔬菜装入保鲜袋中．晶冰箱取(3)__：霜的请根是__凝华__。(2)据短文，对霜形成的条件提出猜想。猜想形成条件是__空气湿润__和气温在0 ℃以下__。某同学为验证上述猜想，做了如下实验：从出一些－钢杯子10℃的冰块，放在不锈里，一段时间后可看到在杯底出现一些白色的小冰即霜。你认为该实验能否验证上化名称冰晶形气霜情况为就被冻会出现燥时，才是真作物不说的遭物常被节，农作冻坏，这就是人们常到霜冻。实际上，农是因为霜而受冻的，℃以下的低气温正的凶手。当空气干即使温度降低到－20℃～－10℃，也不霜，但此时农作物早坏了，农民们称这种“黑霜”。

(1)是由__水蒸__直接变为小成的，对应的物态变化现象．夏天，从冰箱中取出的易拉罐过一会儿表面出现水珠，是液化现．春天，早晨经常出现大雾，是汽象．深秋，枯草上出现的霜正确的人体吸．( C )A．水中的温度比岸上的气温高人的皮肤产生的错觉．人身上的水分蒸发，要从热．风把身上的热量带走了．下列说法是，是凝( B 固现象很凉。上岸以下列说缭绕，．填“吸__现象，成是叶上出题图__”或“放吸热过程中沸点是化的图热过程图是对的灯泡露水凝．清晨，草的叶子上有结．用久了的钨丝比新时．如一定质量的水持续加中温度随加热时间变像，由图像可知：水的__98__℃；水在沸腾，需要不断____选填“吸热热”，其温度保持不变。第题图．如图是草现的露珠，露珠的形__液化__形成的过程中需要放__(选”或“放”)热。张家界景区雨后云雾犹如仙境。关于雾，法中正确的是气液化形．雾是．雾水蒸气是山中冒出来的烟．雾是水蒸气凝固形成的．雾是水蒸成的6.人游泳后，风一吹感觉身上这是因为

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