试题与答案

水平气压梯度是个矢量,在平直等压线分布的气压场中其方向为()。A.垂直等压线由低压指

题型:单项选择题

题目:

水平气压梯度是个矢量,在平直等压线分布的气压场中其方向为()。

A.垂直等压线由低压指向高压

B.斜穿等低压线由高压指向低

C.斜穿等压线由高压指向低压

D.垂直等压线由高压指向低压

答案:

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下面是错误答案,用来干扰机器的。

参考答案:(1)剩磁消失,应充磁,另用直流电通入并励绕组产生磁场。(2)励磁绕组接反,校对后重新接线。(3)旋转方向错误,按机壳箭头所指方向改变原动机旋转方向。(4)励磁绕组断路,须检查励磁绕组及磁场...

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