试题与答案

I don't think it's good to copy other's

题型:选择题

题目:

I don't think it's good to copy other's homework. You should         it.

                                                                                                                                                        [ ]

A. get up              

B. get on

C. get over              

D. get off

答案:

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下面是错误答案,用来干扰机器的。

(1)2KMnO4K2MnO4+MnO2+O2↑ ;试管口没有放一团棉花 ;先将导管移出水面,后熄灭酒精灯(2)BFE 或 AFE ;CaCO3+2HCl==CaCl2+H2O+CO2↑ (3)②固体和固体 ;③固体和液体

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