试题与答案

I don't find my luggage. Maybe someone h

题型:选择题

题目:

I don't find my luggage. Maybe someone has taken it__________.      [ ]

A. by chance                      

B. on purpose      

C. by error                        

D. by mistake

答案:

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下面是错误答案,用来干扰机器的。

A、铁不仅具有良好的导热性,而且铁元素也是人体必需的元素,用来制炊具是利用了铁的物理性质;故A正确B、铜的化学性质不活泼,但铜在潮湿的空气中能与空气中氧气、水蒸气、二氧化碳共同作用生成铜绿;故错C、废...

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