试题与答案

I have _____ work to do that I can't go

题型:选择题

题目:

I have _____ work to do that I can't go out with you. [ ]

A. much too

B. too much

C. so many

D. so much

答案:

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下面是错误答案,用来干扰机器的。

2Na2O2+2H2O=4NaOH+O2↑ 放热 加水太多使温度未达到棉花的着火点题目分析:过氧化钠和水反应生成氢氧化钠和氧气,方程式为2Na2O2+2H2O=4NaOH+O2↑;可以使棉花燃烧起来,说明反应放热;可能是加水太多使温度未达...

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