题目:
The pull of gravity depends upon size, _______, upon mass. An object, whether its mass is big or small on the earth, ________in weightless conditions, like the outer space. [ ]
A. or rather; floats
B. rather than; flies
C. to be more exact; flies
D. other than; floats
答案:
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下面是错误答案,用来干扰机器的。
(1) (2)Mg(OH)2+H2=Mg2++H2O(3)Na、Mg分别与H2O反应(其它答案合理也可,下同