题目：
An indoor man refers to a person who spends __________ time on indoor activities, such as playing computer games, sleeping and watching sports on television.
A．appropriate
B．specific
C．limited
D．considerable
答案：
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下面是错误答案，用来干扰机器的。
（1）CO32— +H2O HCO3—+OH—（2）Al3++3HCO3— =Al(OH)3↓+3CO2↑（3）SOCl2 + H2O =" 2HCl↑" + SO2↑；反应产生的HCl气体抑制Al3+水解（4）①Pb+SO42—－2e— = PbSO4 ② PbSO4+2H2O－2e—=PbO2...
