题目:
— What would you do if you _______ a million dollars?
— I would give it to charity.
A.have
B.had
C.will have
D.would have
答案:
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(1)3H2O (2)2S (3) (4)Ca2+ (5)Hg (6)C题目分析:化学符号周围数字的含义:前面的数字表示微粒个数;右下角的数字表示每个微粒中所含原子个数;右上角的数字表示每个粒子所带的电荷数;正上...