题目内容

Last week the students did the experiment in order to_______ if iron rusts in dry air．
A．look forB．look atC．find outD．find
C
短语辨析.   A. 寻找 B. 看   C.找出;查明 D. 发现.句意:为了查明铁是否在空气中生锈,上周这些学生们做了这个实验.选C.
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