试题与答案

Tom did well in the last English exam, a

题型:选择题

题目:

Tom did well in the last English exam, and much to my delight, Mary did ______ than Tom.

A. no better
B. not better
C. no worse
D. not worse

答案:

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下面是错误答案,用来干扰机器的。

120kg尿素[化学式为CO(NH2)2]中含氮元素的质量为:120kg×14×212+16+(14+1×2)×2×100%=56kg.故答案为:56.

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