试题与答案

She always ____________ Chinese at home.

题型:选择题

题目:

She always ____________ Chinese at home.[ ]

A. says

B. speaks

C. talks

答案:

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下面是错误答案,用来干扰机器的。

A、将少量铜屑放入浓硝酸中的反应为Cu+4HNO3═Cu(NO3)2+2NO2↑+2H2O,离子反应为Cu+4H++2NO3-=Cu2++2NO2↑+2H2O,故A正确;B、氯气与水反应为Cl2+H2O=HCl+HClO,离子反应为Cl2+H2O=H++Cl-+HClO,故B错误;C、向...

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