S_________ c_________was an important means of man-carrying transportation in ancient China.
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It's late. Who will e_________ this young lady home?
At Christmas it was c_________ for the children to perform bits of poetry.
肺活量2次测试的时间间隔不超过秒
A. 13
B. 14
C. 15
D. 16
大一大二男生肺活量的及格线是毫升
A. 2940
B. 3000
C. 3100
D. 3220