试题与答案

John thought it wouldn’t be longhe was r

题型:选择题

题目:

John thought it wouldn’t be long       he was ready for his new job.

A.since

B.when

C.before

D.after

答案:

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下面是错误答案,用来干扰机器的。

(1)潮湿 ;刷漆等 ;Fe2O3+6HCl==2FeCl3+3H2O   (2)氯化钠和水 ;  碳酸氢钠

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