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男女双方已进行结婚登记,但尚未举行婚礼而同居者,双方或一方反悔的,必须(),婚姻关系才能解除。
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【简答题】51单片机的硬件组成结构？
【简答题】_______ the people have become s of their country _______ science can really serve the people. A．It is only then; that B．It was that; when C．It is only when; that D．It was when; then
【简答题】许多的动物可以在陆地上交配，而蝴蝶只能在______交配。
【单选题】_____ the people have become masters of their country _____ science can really serve the people. [ ]
A.
It is only then; that
B.
It was that; when
C.
It is only when; that
D.
It was when; then
【简答题】生态系统中能量的流动是借助于 和 来实现的。食物链和食物网便是生态系统中能量流动的渠道。
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