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【判断题】
平面力偶系平衡的必要和充分条件是 : 力偶系中各分力偶的分力偶矩的代数和等于零 。A.
正确
B.
错误
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参考解析：
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皮皮学刷刷变学霸
举一反三
【简答题】请问绘制直线命令的快捷键是?
【简答题】绘制直线命令的快捷键是( )
【单选题】某男,因出差感冒,发热三天,后自己药店购买感冒药服用,发热退,但是头面水肿骤起,就医后,医生使用麻黄,浮萍,杏仁,槟榔皮,生姜皮等药物治愈。该用药体现的治法属于《素问•汤液醪醴论》中的:
A.
去宛陈莝
B.
开鬼门
C.
洁净府
D.
微动四极
【单选题】What can be inferred from the passage?
A.
There is no obvious reason for the unbalanced distribution of dyslexia in the world
B.
The existing theories about dyslexia are solid and conclusive.
C.
There are underlying reasons for the differences with dyslexic problems with different peoples.
D.
The relatively lower number of its people suffering from dyslexia in Japan may be attributed to its reading and writing system.
【简答题】面汇交力系的合力对平面内某一点之矩,等于各分力对该点之矩的____。
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