Have you ever noticed that your fingers become wrinkly(皱的) after staying in water for a long time? Many people think this happens because the skin takes in water. In fact, scientists say it is caused by changes inside our fingers. The blood vessels(血管) under the skin become narrower, so the skin above them bends(褶皱) and forms wrinkles.
But why do we get wrinkly fingers? Do they have a special use? Some scientists think the
wrinkles may help us hold things better in water. The small lines on our fingers may act like little channels. They can help water move away from the skin, so our fingers are not so slippery(滑的). This may make it easier for us to pick up wet objects.
A scientist named Tom Smulders wanted to test this idea. In his experiment, 20 people moved glass marbles(玻璃球) and metal objects from one bowl to another. They tried it with dry hands, wet hands, wrinkly fingers, and non-wrinkly fingers.
The result was interesting. When the objects were dry, wrinkly fingers did not help much. But underwater, people with wrinkly fingers moved the objects about 12 per cent faster. This seemed to show that wrinkly fingers could help people hold things better in water.
However, another group of scientists later repeated the experiment. This time, they got a different result. They found that wrinkly fingers did not make any difference at all. So, do wrinkly fingers really help us underwater? Scientists still do not have a clear answer. More research is needed to discover the truth.
()61. Why do fingers get wrinkly in water?
A. The skin gets thicker.
B. The blood vessels change.
C. The fingers take in air.
D. The bones become softer.
()62. What may wrinkly fingers help us do?
A. Swim faster.
B. Write better.
C. Hold wet things.
D. Feel less cold.
()63. What did Smulders find about wrinkles?
A. They helped underwater.
B. They helped on dry objects.
C. They slowed people down.
D. They made no difference.
()64. Why does the writer mention another group of scientists?
A. To show the answer is still not clear.
B. To prove Smulders was completely wrong.
C. To ask people not to touch wet objects.
D. To explain how to move glass marbles.
()65. What does the passage mainly tell us?
A. Why fingers are important.
B. How to do water tests.
C. What wrinkly fingers may do.
D. Why scientists like marbles.

61.B 62.C 63.A 64.A 65.C

【分析】
做这篇科普类阅读理解题时，需先通读全文把握主旨，再针对每个题目定位原文对应内容，通过对比原文与选项排除错误答案：1. 第61题定位第一段找手指变皱的原因；2. 第62题定位第二段找皱手指的作用；3. 第63题定位第四段找Smulders的实验结果；4. 第64题定位最后一段分析另一组科学家实验的作用；5. 第65题归纳全文主旨。
【解析】
61题：根据第一段“it is caused by changes inside our fingers. The blood vessels under the skin become narrower”可知，手指变皱是因为血管变化，对应选项B；
62题：根据第二段“the wrinkles may help us hold things better in water”可知，皱手指能帮助握湿物，对应选项C；
63题：根据第四段“But underwater, people with wrinkly fingers moved the objects about 12 per cent faster”可知，Smulders发现皱手指在水下有帮助，对应选项A；
64题：根据最后一段“Scientists still do not have a clear answer”可知，提及另一组科学家是为了说明答案仍不明确，对应选项A；
65题：全文围绕皱手指的作用展开，对应选项C。
【答案】
61.B 62.C 63.A 64.A 65.C
【知识点】
英语阅读理解、细节理解题、主旨大意题
【点评】
本文是关于皱手指的科普短文，题目侧重考查细节定位和主旨归纳，整体难度适中，需学生仔细阅读原文，准确匹配选项与原文信息，避免被干扰项误导。
【难度系数】
0.6