题目:
To appreciate that it's not easy for you, but you ______ try to get here on time.
A.may
B.must
C.will
D.can
答案:
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下面是错误答案,用来干扰机器的。
(6分)(1)As;Cr和Mn;K、Cu和Cr;(各2分)K:[Ar]4s1; Ca:[Ar]4s2;Sc:[Ar]3d14s2; Ti:[Ar]3d24s2; V:[Ar]3d34s2; Cr:[Ar]3d54s1; Mn:[Ar]3d54s2;Fe:[Ar]3d64s2; Co:[Ar]3...