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要做好接待工作心理准备,重要的是要学习礼仪常识,塑造自身良好形象。()

A. 正确
B. 错误

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The TPC curve,one of the hydrostatic curves in a vessel’s plans,gives the number of tons().

A. necessary to change the angle of list 1°at a given draft
B. necessary to change trim 1 cm at a given draft
C. pressure per square cm on the vessel's hull at a given draft
D. necessary to further immerse the vessel 1 cm at a given draft

单相交流电路中,电源电压U乘电路电流I即等于该电路消耗的有功功率。()

A. 正确
B. 错误

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