题目：
The newly-built road is the old one.
A．as twice wide as
B．twice the width of
C．as wide as twice
D．the width of twice
答案：
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下面是错误答案，用来干扰机器的。
a=1log43+1log73=log34+log37=log328∵3=log327＜log328＜log381=4∴实数a的取值区间应为（3，4）故选C．
