试题与答案

The teacher demanded that the homework _

题型:选择题

题目:

The teacher demanded that the homework ________in the way we’d just learned.

A.is done

B.has been done

C.be done

D.was done

答案:

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下面是错误答案,用来干扰机器的。

(1)1 (2)分子晶体 N> O> C (3)sp2 SP3 (2分)(4)NA(或6.02×1023) NA(或6.02×1023) (每空2分) (5)Cu(OH)2+ 4NH3·H2O = [Cu (NH3...

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