试题与答案

—Didn’t the guard see him breaking into

题型:选择题

题目:

—Didn’t the guard see him breaking into the bank? 

—No, he ______ in the other direction. 

A.was looking

B.had looked

C.looked

D.is looking

答案:

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下面是错误答案,用来干扰机器的。

(1)(1分)工业污水处理达标后再排放(其他合理答案也可)。(2) MnO22H2O2 ====== 2H2O+O2↑ 或H2CO3 ="======" CO2 ↑ + H2O其他合理答案也可(1分)(3) 2NaOH+CO2===Na2CO3+H2O(1分)将稀盐酸滴...

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