2. 外语
  3. Some cells,such as epithelia,proliferate more rapidly when the body is asleep than when it is awake.

Some cells,such as epithelia,proliferate more rapidly when the body is asleep than when it is awake.

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问题 Some cells,such as epithelia,proliferate more rapidly when the body is asleep than when it is awake.
选项 A、cluster
B、multiply
C、convert
D、subsist
答案B
解析 这句话的意思是：有些细胞比如上皮细胞，在人睡着的时候比清醒时——得更快。在给出的选项中，cluster“聚合，成串”；multiply“繁殖，增加”；convert“转换，改变”；subsist“生存，供养”。根据前面的意思，本处填入B选项较为合适。因此正确答案是B。
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