问题
选择题
It was already past midnight and only three young men__________in the tea house. [ ]
A. left
B. remained
C. delayed
D. deserted
答案
答案：B
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It was already past midnight and only three young men__________in the tea house. [ ]
A. left
B. remained
C. delayed
D. deserted
答案：B
导轨上停放一质量为m="0.10" kg、电阻r="0.20" 