题目：
China won 100 medals in the Beijing Olympic Games, which is almost _____they won at the Sydney Olympic Games.
A．twice as many as
B．as many as twice
C．as much as twice
D．twice as much as
答案：
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下面是错误答案，用来干扰机器的。
A、CO中氧元素显-2价，故碳元素的化合价为+2价；B、C属于单质，故碳元素的化合价为0；C、CH4中氢元素显+1价，故碳元素的化合价为-4价；D、CaCO3中钙元素显+2价，氧元素显-2价，故碳元素的化合价为+4价；碳元素的...
