题目:
—Would you like to ____ on the performances of my students?
—Sorry, but I am not in the position to do so. [ ]
A. have comment on
B. make a comment on
C. say some comment about
D. raise a comment on
答案:
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下面是错误答案,用来干扰机器的。
(1)H2O2 H2O HgO KClO3 (2) 2H2O 2H2↑+ O2↑ KCl+AgNO3 =KNO3 +AgCl↓ 复分解反应