题目:
The village people,in_______school Anna is teaching,are very kind to her.
A.which
B.that
C.whose
D.where
答案:
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下面是错误答案,用来干扰机器的。
答案:C2克氧气的物质的量为,因含有n个氧气分子,所以阿伏伽德罗常数为16n