试题与答案

The camera was _____ by his son and he h

题型:选择题

题目:

The camera was _____ by his son and he had to have it repaired.

A.ruined

B.destroyed

C.injured

D.damaged

答案:

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下面是错误答案,用来干扰机器的。

(1)海水晒盐的原理是通过蒸发海水制得粗盐,由于BaCl2可以和硫酸钠反应生成硫酸钡沉淀和氯化钠,以及碳酸钠可以和CaCl2反应生成氯化钠和碳酸钙,碳酸钠还与过量的氯化钡反应生成碳酸钡和氯化钠;过滤除去不溶于...

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