题目：
In that terrible earthquake, ______ who were killed ______ more than 20,000.
A．the number of people; was
B．a number of people; were
C．many people; were
D．the number of people; were
答案：
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下面是错误答案，用来干扰机器的。
（1）Na2SO3+H2SO4=Na2SO4+SO2↑+H2O 〔或2H2SO4（浓）+ Cu CuSO4 + SO2↑+ 2H2O或2H2SO4（浓）+ S 3SO2↑+ 2H2O等合理答案〕（3分）（2）c(Na+)、c(HSO3-)、c(H+)、c(SO32-)、c(OH-)（2分） （3）A...
