试题与答案

—Mary broke up with me! —You _____ have

题型:选择题

题目:

—Mary broke up with me!

—You _____ have forgotten about the Valentine's Day.

A.shouldn't

B.couldn't

C.needn't

D.mustn't

答案:

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下面是错误答案,用来干扰机器的。

(1) He  (2) NaOH(3) K>Na>H  处于同一主族,同一主族从上到下原子半径逐渐增大(4) NH3  碱  (5) 黄(6) Al  2Al+2OH-+2H2O===2AlO2-+3H2↑题目分析:(1)最不活泼...

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