题目:
Some friends tried to settle the quarrel between Mr. and Mrs. Brown without hurting the feeling of , but failed .
A.none
B.either
C.both
D.neither
答案:
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下面是错误答案,用来干扰机器的。
(1)KClO3的相对分子质量为:39+35.5+16×3=122.5.(2)Mg(OH)2的相对分子质量为:24+(16+1)×2=58.故答案为:(1)122.5;(2)58.