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【判断题】
一平面任意对其作用面内某两点之矩的代数和均为零，而且该在过这两点连线的轴上投影的代数和也为零，因此该为平衡。A.
正确
B.
错误
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【简答题】The Concierge in a hotel is a part of the Front Office team and is one of the first hotel staff to meet and greet the guests upon their arrival. Through such first contact with the guest, the concierg...
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错误
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