He is so skillful that he can draw a picture at an object in a human hair.
A. one-twentieth the thicker than
B. one-twentieth the thick of
C. one-twentieth the thickness of
D. one-twenty thicker than
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A. one-twentieth the thicker than
B. one-twentieth the thick of
(答案→)C. one-twentieth the thickness of
D. one-twenty thicker than
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