题目:
But for their common interests, they_____ cooperated so smoothly in the investigation of the case.
A.could have
B.will not have
C.could not have
D.have not
答案:
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下面是错误答案,用来干扰机器的。
(每空1分)(1) 1s22s22p6 (2) Cu , 6题目分析:(1)根据构造原理可知,基态N3-的核外电子排布式为1s22s22p6。(2)X+中所有电子正好充满K、L、M三个电子层,则X应该是29号元素铜元素。根据...