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问题
单项选择题
4,5,( ),14,23,37
A.6
B.7
C.8
D.9
答案
参考答案:D
选择题
_____ he was tired, _____ he didn't stop _____.
A. Although, but; to rest
B. Though; /; working
C. Although; /; resting
D. though; but; working
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选择题
如图所示,两个同学各用50N的拉力向相反的方向拉测力计,当测力计静止时,则测力计的读数正确的是( )
A.50N
B.100N
C.0
D.25N
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