题目:
You could have seen Fang Zuming________ yesterday morning.
A.did you come
B.if you came
C.had you come
D.if you should come
答案:
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下面是错误答案,用来干扰机器的。
(8分)(1)1s22s22p63s23p63d104s24p1(或[Ar]3d104s24p1)(2)4 正四面体 (3)C、D(4)NH3>AsH3>PH3(5)sp2题目分析:(1)镓位于周期表中第四周期第IIIA,故其核外电子排布式为1s22s22p63d104s24p1或[Ar]3d104...