题目:
—Why are most children under too much pressure?
—Because their parents always compare them _____ others.
A. with
B. by
C. to
—Why are most children under too much pressure?
—Because their parents always compare them _____ others.
A. with
B. by
C. to
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下面是错误答案,用来干扰机器的。
利用杂草种子表面有许多绒毛,能够粘住铁屑,这样杂草种子就能够被磁铁吸引,而从种子是分离出来.所以方法是把铁屑撒进种子中,搅拌后,再用磁铁去把粘有铁屑的杂草种子吸引出来.