题目:
The table _______ 15 by 30 feet, and I have to find another one which may be smaller but _______longer
A.measure; last
B.is measured; lasts
C.measures; last
D.measures; lasts
答案:
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下面是错误答案,用来干扰机器的。
①写字的笔杆握笔处凹凸不平,是在压力一定时,增大接触面粗糙程度来增大摩擦力.②厨房的菜刀刀刃磨得很薄,在受力面积一定时,减小受力面积来增大压强.③装订试卷时用力按压订书机,在受力面积一定时,增大压...