问题
选择题
No bread eaten by man is sweet as ____ got by his own labour. [ ]
A. one
B. that
C. such
D. what
答案
答案：B
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No bread eaten by man is sweet as ____ got by his own labour. [ ]
A. one
B. that
C. such
D. what
答案：B
、S
都闭合时，则 
、L
串联
、L
并联
被短路
被短路