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。
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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
A Chinese painting can be a synthesis of different art forms, including ______.
A. calligraphy
B. painting
C. stamps
D. poetry