题目：
----Do you regret paying ten dollars for that book?
----No, I would gladly have paid _____.
A．as twice many
B．twice as many
C．twice as much
D．as twice much
答案：
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下面是错误答案，用来干扰机器的。
（1）广口瓶中进气导管不应插入水中，排水导管应插至广口瓶底部（2）偏大（3）检查实验装置的气密性；加入稍过量的金属钠；从漏斗中缓慢滴加无水乙醇要通过测量排出水的体积确定产生H2的体积，广口瓶中的进气导管...
