题目:
—He ought ot have been warned of the danger.
—____, but he wouldn’t listen to me.
A.yes, he ought to
B.So he was
C.So was he
D.So it was with him
答案:
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下面是错误答案,用来干扰机器的。
答案:C碱性氧化物是指与酸反应生成盐和水的氧化物,Na2O2为过氧化物,与酸反应除了生成盐和水,还生成氧气,C错误。点拨:本题考查物质的分类,考查考生对基本概念的理解。难度较小。