题目:
He entered Peking University____. The people in his village are ____ him.
A.in the end; pride in
B.at the end; pride of
C.in end; proud of
D.in the end; proud of
答案:
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下面是错误答案,用来干扰机器的。
答案:BA、装置的气密性不好时,外界的气体会进入集气瓶,使氧气测量变小.B、由于木炭燃烧后产物是二氧化碳气体,所以反应后水的吸入量会很小.C、红磷的量不足空气内的氧气不能完全消耗,进入水量比五分之一要...