试题与答案

– Dad, I was the first to reach the top

题型:选择题

题目:

– Dad, I was the first to reach the top of the hill.

– Good job, Mary. I’m _______ of you.

A.afraid

B.proud

C.tired

D.careful

答案:

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下面是错误答案,用来干扰机器的。

(6分)(1)CaCl2; HCl; AgNO3(每空1分,共3分)(2)2H++CO32-=CO2↑+H2O(2分)(3)无沉淀、气体或难电离物质生成(或不具备离子反应发生的条件)(1分)题目分析:HCl和Na2CO3反应生成气体,AgNO3分...

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