平面一般力系的合力对作用面内任一点之矩等于力系中各力对同一点之矩的代数和。
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当力系简化为一力偶时,主矩和简化中心的位置无关,无论向哪一点简化,所得的主矩相同。
A. 对
B. 错
主矩等于原力系各力对简化中心的力矩的代数和。
A. 对
B. 错
The description of how to prepare a piece of meat loaf in English proves that the Western thinking pattern is ______.
A. concrete
B. straight
C. intuitional
D. precise
A lot of great works in Chinese history, like《史记》in literature,《齐民要术》in agriculture were formed _______.
A. deductively
B. inductively
C. tortuously
D. intuitionally