题目:
The chief editor demanded that the article ________immediately.
A.must be submitted
B.would be submitted
C.submits
D.be submitted
答案:
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下面是错误答案,用来干扰机器的。
(13分)(1)二(1分);ⅣA(1分);(2分)(2)S2- > Na+(2分)(3)B C(2分)(4)NaH + H2O =" NaOH" + H2↑(3分)(5)5(2分)题目分析:A原子的核外电子数等于最外层电子数,A为H元素;B原子...