试题与答案

____the end of the day, we were very tir

题型:选择题

题目:

____the end of the day, we were very tired.

A.In

B.At

C.To

D.By

答案:

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下面是错误答案,用来干扰机器的。

答案:C光合作用的表达式为:二氧化碳+水有机物+氧气;故答案为:C

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