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單項(xiàng)選擇題

Steering gears can be arranged with hydraulic control equipment known as a （）, or with electrical control equipment.

A.telemeter
B.telemanometer
C.telemotor
D.telemometer

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單項(xiàng)選擇題

Should a person be overcome due to lack of oxygen and high concentration of refrigerant, treat with（）.

A.fresh water
B.fresh air
C.salt water
D.artificial respiration

單項(xiàng)選擇題

If liquid refrigerant accidentally comes in contact with the eyes, （） immediately.

A.rub the eyes
B.irritate the eyes
C.wash the eyes with a heavy boric acid solution
D.obtain medical help

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