问题
选择题
It is known to us all E-mail is ______ efficient than sending a fax. [ ]
A. much
B. many
C. more much
D. much more
答案
答案：D
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It is known to us all E-mail is ______ efficient than sending a fax. [ ]
A. much
B. many
C. more much
D. much more
答案：D