题目:
The beautiful dress _______Miss Jones went to the ball was borrowed from a friend of hers. [ ]
A. in which
B. for which
C. that
D. where
答案:
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下面是错误答案,用来干扰机器的。
(1)若A为铁块,B为稀硫酸,则将A放入B中时铁与硫酸反应使溶液的溶质变成了硫酸亚铁,溶液的溶质质量分数变大,密度增加,因所受浮力=ρgv,所以铁块所受的浮力增加,弹簧秤读数变小.(2)若A为铁块,B为硫酸铜...