相关习题
 0  18143  18151  18157  18161  18167  18169  18173  18179  18181  18187  18193  18197  18199  18203  18209  18211  18217  18221  18223  18227  18229  18233  18235  18237  18238  18239  18241  18242  18243  18245  18247  18251  18253  18257  18259  18263  18269  18271  18277  18281  18283  18287  18293  18299  18301  18307  18311  18313  18319  18323  18329  18337  151629 

科目: 来源: 题型:

Have you dreamed about       such a good chance for further education abroad?

A. there is     B. there being    C. there to be    D. there will be

查看答案和解析>>

科目: 来源: 题型:

Mr. Smith works as a government official now, but he ____________ in a middle school for 5 years.

  A. has worked    B. worked     C. had worked    D. had been working

查看答案和解析>>

科目: 来源: 题型:

The UN is _______ countries that want to increase peace.

   A. made of          B. consisted in        C. made from         D. made up of

查看答案和解析>>

科目: 来源: 题型:

The women carrying babies, get on the bus first ,________?

 A will they     B don’t you       C will you         D don’ t they

查看答案和解析>>

科目: 来源: 题型:阅读理解

  Things similar continuously happened in Haiti and Chile.Thousands of people were

buried in the earthquake and lost their fives.What if we could have warned them? People are always trying hard to find a way of preventing building collapsing(坍塌).Better materials and technology help,but are not a solution.Just like humans,a building has its own life circle from  “birth” to “death”.If we know when a building is going to collapse,we can repair it in advance or get out before it falls.

    Now, scientists at the University of Illinois have developed a material that turns red before it breaks.The invention could be used in things like climbing ropes,or bridge supports.The secret behind the color-changing material is a type of molecule(分子).A molecule is a group of atoms held together by chemical bonds(化学键).Imagine you and your friends standing in a circle,holding hands.Each person stands for one atom,your hands represent the bonds,and the entire circle represents a molecule.If one person lets go of his or her hands,the molecule changes color.The research team put the molecule into a soft material.When the researchers stretched(拉长) the material:it turned bright red a few seconds before it broke into two pieces.

When they repeatedly stretched and relaxed the material,without breaking it,it only turned a little red.

The major problem is,light can get rid of the red color.When the team shone a bright light on the molecule,the broken bond was fixed,and the color disappeared.If bright fight keeps the red color from appearing,the material’s warning system will be useless.Scientists still have a lot of work to do before the color-changing molecule can be used outside the lab.

The passage mainly about

A. a way of preventing building from breaking down

B. a series of earthquakes in Haiti and Chile

C. a way of warning before buildings collapse

D. a newly-discovered structure of a molecule

According to the passage,we can conclude that

A.there are problems to solve before putting the new material to use

B.scientists have found the life circle of buildings from “birth” to “death”

C.bright fight makes the red color visible to human eyes

D.the new material is unlikely to be used in building bridges

The color-changing molecule can

A.make building materials much stronger

B.help building materials get stretched if necessary

C.prevent the earthquake from killing people

D.remind people to leave buildings before they fall

The warning system is based on the fact that

A.red color won’t show up when it meets bright fight

B.a material with a certain type of molecule Can turn red when stretched etched

C.a building has its own life circle of “birth” to “death”

D.the broken bond will fix itself when a molecule meets bright fight

查看答案和解析>>

科目: 来源: 题型:

假设你叫李华,你从报上得知某公司欲招聘一名英语翻译,请你给该公司经理写一份求职信,你的个人资料如下:

  简况:姓名,李华;年龄,23岁;身高,1.80米;健康状况,良好;业余爱好,游泳、唱歌、跳舞。2010年即将从北京大学英语系毕业。与同学相处融洽。精通英语,尤其口语,已将多篇文章译成英语,懂一些日语、能用日语与外宾对话。

  住址:北京市人民路1号  联系电话:3654371

Dear manager,

________________________________________________________________________________

 Yours Truly

                                                                             Lihua

查看答案和解析>>

科目: 来源: 题型:

I will stay in the hotel          there is some news about the missing girl.

      A.in case      B.in case of  C.if only             D.unless

查看答案和解析>>

科目: 来源: 题型:

________ his pale face, we all suggested ________ to see the doctor right away.

A. Seeing; he going               B. Having seen; him go  

C. Seeing; his going                D. Seen; him going

查看答案和解析>>

科目: 来源: 题型:

作为一名中学生,和老师建立良好的师生关系是必要的。请你围绕下面的两个话题写一篇英语短文,谈谈自己的看法。

1. 你认为良好的师生关系应该是怎样的?

2. 如何才能建立这种关系?

注意:

1. 可以使用一些具体的实例支持你的论点;

2. 词数100—120左右,开头已为你写好,不计入总词数。

As a middle school student, it is necessary to build a good relationship with our teachers

查看答案和解析>>

科目: 来源: 题型:

You’d better carry a(n) ________ tyre in the back of your car in case it breaks down on the way.

A. extra          B. free               C. convenient         D. spare

查看答案和解析>>

同步练习册答案