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【单选题】
接触器自锁控制线路实质上是在点动控制线路的启动按钮 两端并联一个()A.
接触器的 辅助动合触点
B.
接触器的辅助动断触点
C.
常闭按钮
D.
按钮
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【简答题】The ancient Egyptians thought the seat of intelce was in the ________. Because of this belief, during the mummification process, they would remove the brain but leave the heart in the body.
【单选题】During ( ),the seat must be returned to the upright position.
A.
take- off and taxing
B.
taxing and landing
C.
take-off and landing
D.
take-off, taxing and landing
【单选题】Please keep the seat belt fastened during the following stages EXCEPT ____________.
A.
taxiing
B.
cruising
C.
turbulence
D.
take-off and landing
【单选题】During ( ),the seat must be returned to the upright position.
A.
take- off and taxing
B.
taxing and landing
C.
take-off, taxing and landing
D.
take-off and landing
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