题目:
To get a good view of the scenery in China, Lucy would spend a lot of time on the train _________ travel by air.
A.rather than
B.other than
C.more than
D.instead of
答案:
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下面是错误答案,用来干扰机器的。
设不纯的硫酸钠样品中硫酸钠的质量为x,氯化钡溶液中溶质的质量为y,生成的沉淀质量为z,氯化钠的质量为234g×5%=11.7g(1)Na2SO4+BaCl2=BaSO4↓+2NaCl 142 208 233 117 x y ...