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Sleep is something we generally associate with living creatures. Of course,
Sleep is something we generally associate with living creatures. Of course,
游客
2025-07-31
11
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问题
Sleep is something we generally associate with living creatures. Of course, it is 【B1】 that a lot of animals sleep, but zoologists are certain that 【B2】 forms of animal life, 【B3】 worms and snails, never really sleep. On the other 【B4】 , animals such as bears sleep for 4 【B5】 5 months every year.
The 【B6】 of sleep a human being needs 【B7】 on age, the individual and possible 【B8】 . For example, doctors think that pre school children need between 10 and 12 hours a night, school children between 9 and 11 hours, and 【B9】 between 7 and 8 hours. There are exceptional 【B10】 of old people 【B11】 only sleep between 2 and 3 hours a day and 【B12】 to be active and healthy. The sleep 【B13】 of different 【B14】 also appear to be 【B15】 . Japanese people for example, sleep 【B16】 hours than Europeans.
【B17】 is not known for 【B18】 whether mental activity 【B19】 when a person is asleep. However, it is certainly true that some people can wake 【B20】 at a specific, pre-determined time.
选项
A、genuine
B、真
C、indeed
D、sincere
答案
B
解析
[A] genuine真正的(不是假的),[B]true真实的,[C]indeed,副词,的确;[D]sincere真诚的,根据文章意思,答案选B。
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