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The human growth hormone, made by the pituitary gland, is secreted during sleep
The human growth hormone, made by the pituitary gland, is secreted during sleep
游客
2025-02-25
8
管理
问题
The human growth hormone, made by the pituitary gland, is secreted
during sleep in higher concentrations than when awake
.
选项
A、during sleep in higher concentrations than when awake
B、when sleeping in higher concentrations than waking hours
C、in higher concentrations during sleeping than waking
D、in higher concentrations during sleep than during waking hours
E、in higher concentrations when asleep than when awake
答案
D
解析
when awake是一个从句省略形式,从语法上讲,省略了主语hormone;但这在逻辑上解释不通,因为“只可能是人在醒着的时候,而不可能是荷尔蒙醒着的时候”。因此,A、E错。B中的when sleeping和C中的during sleeping都存在找逻辑主语的问题,而其逻辑主语“人”根本未在句中出现(句首的human作定语)。而D中,用两介词短语during sleep和during wakinghours,则避免了找逻辑主语的问题。waking hours是一个标准的习惯表达。
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