问题
选择题
This math problem is ______ difficult ______ that one. [ ]
A. as; than
B. as; as
C. so; as
D. very; than
答案
答案：B
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This math problem is ______ difficult ______ that one. [ ]
A. as; than
B. as; as
C. so; as
D. very; than
答案：B