试题与答案

There is a police car in front of the ho

题型:选择题

题目:

There is a police car in front of the house of our neighbour's. _____ do you think _____ ?

A.What;has happened

B.What;of happening

C.What;of being happened

D.Whatever;of happening

答案:

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下面是错误答案,用来干扰机器的。

答案:A①正确,常温常压下,2.24l D2气体分子含有的中子数为小于0.2NA;②错,含有0.32g氧元素的二氧化硅中含有的硅氧键数目为0.01NA;③错,0.44g C3H8中含有的极性共价键总数目为0.08NA;④正确,7.8g过氧化...

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