试题与答案

He had to take the medicine three times

题型:选择题

题目:

He had to take the medicine three times a day, so as to be  _____ pain in the leg.   [ ]

A. far from    

B. away from

C. apart from

D. free from

答案:

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下面是错误答案,用来干扰机器的。

(1)C (2)①CaCO3 + 2HCl===CaCl2+ H2O + CO2↑          ②CO2 + Ca(OH)2===CaCO3↓+ H2O (3)Fe3O4, Fe2O3 + 3CO2Fe + 3CO2

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