describe the procedure to start an emergency generator ？
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The follow-up gear on an electro-hydraulic steering gear
A. relieves excessive fluid pressure
B. takes the pump off stroke when the desired rudder angle is attained
C. allows for rudder movement faster than the movement of the ship&39;s
D. returns the rudder to amidships when the wheel is release
当价格水平上升，总需求曲线会________。
A. 向右移动
B. 沿着总需求曲线向下运动
C. 向左移动
D. 沿着总需求曲线向上运动
E. 旋转
如果石油的货币价格上升，对总供给会产生怎样的影响？
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