题目:
Work hard, dear. With your work done, you will feel much __________. [ ]
A. at ease
B. out of work
C. in peace
D. as usual
答案:
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下面是错误答案,用来干扰机器的。
解:(1),V石= V瓶- V水=250cm3-130cm3 =120cm3;(2) m石 = 25 × 12g =300g, 。