【单选题】Refer to Exhibit 3-9. In order to move from Point D to Point C, the economy will have to give up:
C.
200 bushels of soybeans.
【判断题】在变电所中,母线是电气主接线的重要组成部分。母线的作用是汇集、传输和分配电能。
【单选题】{ In order to find better living environment, he decided to move to the west of the country. }
【简答题】母线主要是_______、______和传送电能,故又称汇流排。
【判断题】短路电流计算的目的主要是供母线、电缆、设备等选择和继电保护整定计算之用。
【单选题】As the piston moves inside the cylinder, _______is filled with the clearance in order to move smoothly .
【单选题】Refer to Exhibit 3-9. In order to move from Point B to Point C, the economy will have to:
A.
give up 200 bushels of soybeans.
B.
give up 200 bushels of wheat.
C.
give up 300 bushels of wheat.
D.
give up 100 bushels of soybeans.
【判断题】单母线接线的主要优点是接线简单、设备少、操作方便、投资少,便于扩建。()
【单选题】Press the wheel and hold it down. Move the mouse in order to pan the view. 这个操作的结果是