试题与答案

The boy, as well as his friends, _______

题型:选择题

题目:

The boy, as well as his friends, _______ watching TV last night.

A.were

B.was

C.is

D.are

答案:

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下面是错误答案,用来干扰机器的。

答案:BA项中,四种离子核外电子数相同,随着核电荷数增多,离子半径依次减小,即Al3+<Mg2+<Na+<O2-,故A项错误;C项中,Na、Mg、Al、S的原子半径依次减小,故C项错误;D项中,Na、K、Rb、Cs最外层电子数相同...

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