It took 100years.but finally.scientists proved Albert Einstein's theory that gravitational waves exist．The waves were predicted as part of Einstein's General Theory of Relativity nearly 100years ago� 题目和参考答案——青夏教育精英家教网—

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18．It took 100years，but finally，scientists proved Albert Einstein's theory that gravitational waves exist．
The waves were predicted as part of Einstein's General Theory of Relativity nearly 100years ago．It was the theory of the physics behind the workings of our world and the universe．The idea was that the waves are like ripples（涟漪）in space，caused by some of the violent and energetic processes in the Universe．For example，two black holes crashing into each other．
Now a group of scientists，including ones from CalTech，MIT and the LIGO Scientific Collaboration finally found the gravitational waves．
David Reitze is the executive（有执行权的）director of the LIGO observatory（天文台） at CalTech．"We have detected gravitational waves．We did it!"Reitze spoke with others at a press conference in Washington，DC this past week．The scientists announced they were able to see ripples in the fabric（织物）of space time．
What are these gravitational waves？Well，imagine throwing a rock into a pond．When the rock hits the flat surface of the water，it creates ripples or waves．Space time is like the surface of the water．So that means gravitational waves are like the ripples moving out from where the rock hits the water．
It might be hard to understand，but those gravitational waves expand and contract space and time as they move through space．And when they get to the Earth，the waves pass through，and contract and expand the planet as the wave goes by．
It was Einstein who said these gravitational waves should be observable．But these are not huge waves．They are very，very small，which is why it took so long to find them．You cannot see them with your eyes．They are smaller than the size of an atom．
How did the scientists find them？They used a giant scientific tool called LIGO-which stands for the Laser Interferometer Gravitational-Wave Observatory．The billion-dollar LIGO project is two L-shaped observatories．One is in Louisiana and one in Washington state．Their job was to watch for these gravitational waves．They have been looking on and off since 2002．
For years，scientists have been watching two black holes in another galaxy（银河）faraway．The two were spinning around each other，moving closer and closer together．When they finally crashed into each other，it was with such power and force，that gravitational waves rang throughout the universe，like a giant bell．Those waves，traveling at the speed of light，finally reached the Earth，some 1.3billion years later．They are the same waves that the scientists announced this past week．Each of the black holes was thought to be 29to 36times the mass of our sun．
So，what does this discovery mean？
Abhay Ashtekar is a Penn State physicist，who was not on the discovery team．He said："Our understanding of the heavens changed dramatically．"

24．According to the text，which of the following statements is true？C
A．Gravitational waves have been existing for 100years．
B．Albert Einstein proved the existence of gravitational waves．
C．Gravitational waves travel as fast as light．
D．Albert Einstein predicted the existence of black holes．
25．What can be inferred from the text？A
A．The LIGO project costs a lot of money．
B．The LIGO project is directed by Abhay Ashtekar．
C．The LIGO has been watching for gravitational waves continuously．
D．The LIGO observatory is intended to detect black holes．
26．What is the text mainly about？B
A．Einstein's General Theory of Relativity．
B．The detection of gravitational waves．
C．David Reitze's LIGO project．
D．The crash of two black holes．
27．The underlined word"contract"probably meansB．
A．make a legal agreement with someone
B．become shorter or narrower or smaller
C．catch or develop an illness
D．communicate with someone．

分析本文是一篇科教类阅读，报道了最近发现的引力波．文章详细介绍了引力波的产生，引力波发现的意义和引力波的寻找过程

解答 24-27CABB
24题答案：C考查细节推理，根据原文倒数第二段的Those waves，traveling at the speed of light…"那些波（引力波）以光速传播…"可知本题答案为C选项．
25题答案：A考查细节推理，根据文章倒数第三段的The billion-dollar LIGO project is two L-shaped observatories…"这个花了一亿美元的工程是两个L型的天文台…"可知本题答案为A选项．
26题答案：B考查细主旨概括，文章详细介绍了引力波的产生，引力波发现的意义和引力波的寻找过程；故本题答案为B选项．
27题答案：B考查细节推理，根据文章第六段的but those gravitational waves expand and contract space and time as they move through space．"但是当这些引力波穿过太空时它们会波扩张并且___空间和时间．"可知contract一词的含义为"使某物变短、变小或变窄"，故本题答案为B选项．

点评本文是一篇科教类阅读，题目涉及多道细节理解题，做题时结合原文和题目有针对性找出相关语句进行仔细分析，结合选项选出正确答案．推理判断也是要在抓住关键句子的基础上合理的分析才能得出正确的答案．

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According to her，there are several safe topics to talk about with colleagues during the break，such as the weather or movies．Women like to talk about makeup and clothing，while men are fond of sports and online games．But discussing your private life，such as relationship，habits or health conditions，is a potential minefield．
Liang Kun，26，had to resign from his job at a trading company in Guangzhou last week after discussing her income with colleagues during a lunch break．"I didn't realize it was such a serious issue until a senior member of staff went to find the boss，asking why I got a higher salary than her，"said Liang．‘‘Then our HR told me that according to the employee handbook it is forbidden to talk about salary in the office．"HR expert Yang also reminds us that paychecks are your own business．It is unwise to share this information with others，no matter how close you are．
To summarize，Yang advises office workers to be more aware of the image they project when talking to colleagues，"When you share your personal life，it will be recorded on your invisible resume and may slow clown your career progressing．"

60．The author quoted Yang Yudan in the text toC．
A．show his admiration for her B．make an argument with her
C．support his own viewpoint    D．build up his fame
61．What can be inferred from the fact that Liang Kun had to resign his job according to the text？B
A．It was unwise for him to share information with others．
B．He broke the rules made by the company-
C．He was such an honest person that he told the truth．
D．He treated his colleagues as family members．
62．What is the author*s purpose in writing the text？D
A．To draw people's attention to their behaviors in public．
B．To advise office workers to be aware of the image they project．
C．To make you believe that communication in the office is complicated．
D．To warn you to be careful of invisible trouble while talking about your privacy to colleagues．
63．Which would be the best title for the text？A
A，At Work，Keep It to Yourself           B．Keep the Right Balance
C，Share Your Personal Life with Others   D．Safe Topics to Talk about．

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