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【单选题】
红军第五次反“围剿”失利的主要原因是( )A.
敌强我弱
B.
装备落后
C.
错误的指挥方针
D.
叛徒出卖
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皮皮学刷刷变学霸
举一反三
【单选题】What was Frank Date's problem when he became the publisher of Los Angeles Herrald-Examiner?
A.
He had lost interest in his publishing career.
B.
He found it hard to introduce himself to everyone.
C.
Los Angeles Herrald-Examiner was in extrame difficulty
D.
Los Angeles Herrald-Examiner was on a ten-year strike.
【简答题】等电位连接结构有________和________两种。
【简答题】一渐开线标准直齿圆柱齿轮,已知齿数Z=32,模数m=3mm,压力角α=20o,ha*=1,c*=0.25。试求该齿轮的分度圆直径、齿顶圆直径、齿根圆直径、基圆直径和分度圆齿厚。
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