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单选题

Question 24 is based on the passage you have just heard.

A
About one week.                          
B
About two days.  
C
About ten days.    
D
About four weeks.
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答案:

B

解析:

Passage Three

听力原文

    After a tough workout or a day full of physical activity, it’s common to find your muscles aching, but where do these pains come from? (22) According to a German professor, the soreness comes from straining your muscles in an uncommon way. For example, jumping on a bicycle for a ride because you haven’t ridden in a long time. Soreness occurs since your leg muscles aren’t used to that movement. When muscles perform an activity, they aren’t regularly expose to, the tiny fibers that are inside them are being torn apart. As muscle soreness develops, the body has to work to repair the muscle tears, but this doesn’t happen immediately. (23) First, the body must realize the muscles are damaged. When the body realizes the muscles are hurt, the response is to increase blood flow to the area and increase body heat, damaged cells are then cleaned up and the body sends cells specially designed to break down the large muscle fiber fragments. Healing can take place after this. It takes about a day until these cells make it to your aching muscles. That’s why there is most often a delay associated with muscle soreness. (24) Repair of damaged cells takes about two days, and afterwards the soreness disappears. (25) Unfortunately, there is little that can be done to relieve muscle soreness. Pain relieving creams don’t work, but a hot shower, or warm bath can provide some relief.

24. How long does it take for damaged cells to heal?

解析:B。录音末尾部分提到,受损细胞的修复大约需要两天,about two days为原词复现,题目中的heal对应录音中的Repair,故正确答案为B。

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