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1、2015 济南市高考英语（四月）完形填空、阅读理解小练（2）答案【2015 高考复习】阅读理解Does stress cause gray hair？Many people believe that tension and stress can cause your hair to lose its color.In fact，it is an_old_wives_tale that being upset all the time can result in premature graying.Here is a closer look at this situation and why s
2、ome believe that this old wives tale could be true.As one ages，the hairs on the head also age.In fact，just about everything on the human body begins to show signs of wear and tear after a while.The joints wear and become stiff and skin wears and becomes wrinkled.Hairs on the head grow and eventually
3、 die.They are replaced，but in the process something else happens.When new hairs are replaced，the color or pigment (色素) is also added to them.However，as one ages，this pigment becomes less and less available.At first，hairs will have a limited amount of pigment and they will appear to be grayish in col
4、or.In time，they will lose all of their pigment and will be white.Many things are known to cause graying，and genetics is a very powerful factor.If one of your parents turns gray at an early age，there is a good chance that you will too.Some people begin the graying process in high school，while others
5、may be over the age of forty.Constant worry and tension can have many harmful effects on the human body.It is a known fact that stressful times can cause one to suffer hair loss.It would make sense that if it can cause these problems，perhaps it also may contribute to graying.However，there is no soun
6、d evidence to support this.On the other hand，many medical professionals believe that there may be a link between graying and a constant state of anxiety or tension.Does stress cause gray hair？There is no scientific evidence to support the theory，but it is best to avoid stressful situations.【语篇解读】 压力
7、会导致头发变白吗？许多人相信情况是这样的。本文从年龄和基因两方面谈了头发变白的原因，持续的压力和忧虑对于身体是有害的，可导致脱发。但是，究竟压力和头发变白之间是否有联系，目前尚无定论。1The underlined phrase in the first paragraph most probably means_.Aclever remarks Bsilly remarksCexciting remarks Ddisappointed remarks解析 词义猜测题。画线短语前面提到“Many people believe that tension and stress can cause
8、your hair to lose its color”，即许多人相信紧张和压力导致头发褪色变白。短文接着谈到“In fact，it is.”，这是推测画线词意思的关键。因此 an old wives tale 意为“无稽之谈”。答案 B2The second paragraph mainly tells us_.Aevery part of body is replaced with ageBhairs will grow weak but not dieCskin becomes wrinkled with age Devery part of body ages with age解析 主
9、旨大意题。第二段第一句话是该段的主题句。从中可以看出，人体的每一部分都会随着年龄的增长而衰老。答案 D3What might play the most important role in the graying process?AGenetics and the amount of sleeping time.BThe amount of food people eat and living environment.CThe amount of pigment and genetics.DGenetics and the amount of water people drink解析 细节理解
10、题。本文第三段提到“At first，hairs will have a limited amount of pigment and they will appear to be grayish in color.In time，they will lose all of their pigment and will be white.Many things are known to cause graying，and genetics is a very powerful factor.”由此可以看出，色素和基因在头发变白的过程中起着重要的作用。答案 C4According to the p
11、assage，continuous pressure may result in_.Aa persons fatness Ba persons fitnessCa persons weight loss Da persons hair loss解析 细节理解题。本文倒数第二段提到“Constant worry and tension can have many harmful effects on the human body.It is a known fact that stressful times can cause one to suffer hair loss”。由此可知，持续的压
12、力会导致脱发。答案 D5From the passage we can infer that_.Astress causing gray hair is still in questionBgray hair has nothing to do with tensionCstressful situations can be of benefitDsound evidence has been found解析 推理判断题。本文倒数第二段最后提到“However，there is no sound evidence to support this.”最后一段也提到“There is no sci
13、entific evidence to support the theory.”。由此可知，是否压力会引起头发变白仍无定论。答案 A。阅读理解。Just seven years ago, the Jarvik-7 artificial heart was being cheered as the model of human creativeness. The sight of Barney Clarkalive and conscious after trading his diseased heart for a metal-and-plastic pumpconvinced the pr
14、ess, the public and many doctors that the future had arrived. It hadnt. After monitoring production of the Jarvik-7, and reviewing its effects on the 150 or so patients (most of whom got the device as a temporary measure) the U.S. Food and Drug Administration concluded that the machine was doing mor
15、e to endanger lives than to save them. Last week the agency cancelled its earlier approval, effectively banning (禁止) the device.The recall may hurt Symbion Inc., maker of the Jarvik-7, but it wont end the request for an artificial heart. One problem with the banned mode is that the tubes connecting
16、it to an external power source created a passage for infection. Inventors are now working on new devices that would be fully placed, along with a tiny power pack, in the patients chest. The first sample products arent expected for another 10 or 20 years. But some people are already worrying that theyll work-and that Americas overextended health-care programs will lose a precious $2.5 billion to $5 billion a year pr
