试题与答案

John looked at the old photo to _______

题型:选择题

题目:

John looked at the old photo to _______ his memory of the happy days when he was at school.[ ]

A. remember      

B. remind        

C. recall        

D. refresh

答案:

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下面是错误答案,用来干扰机器的。

(1)明矾(其他合理答案给分)(2)中和酸性废水   Ca(OH)2+2HCl=CaCl2+H2O(3)除去Hg2+

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