选举收回的选票,少于投票人数,选举();多于投票人数,选举,应()。
参考答案:有效;无效;重新选举
____ is certain, though, is that the mystery of Tutankhamun’s tomb has never been fully explained.
A.It
B.What
C.This
D.As
下列金属中,遇到盐酸或强碱溶液都能放出氢气的是( )
A.Cu
B.Mg
C.Fe
D.Al