问题
选择题
There is no quick way of finding a cure for any disease; it is a process of _______.[ ]
A. sooner or later
B. now and then
C. every other day
D. trial and error
答案
答案：D
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There is no quick way of finding a cure for any disease; it is a process of _______.[ ]
A. sooner or later
B. now and then
C. every other day
D. trial and error
答案：D
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