国产a级一级久久毛片,亚洲午夜高清无码

單項選擇題However fast or slow the combustion rate, it is still a （） between carbon, hydrogen, sulphur and oxygen that releases heat.

A.physical deformation
B.state exchange
C.chemical reaction
D.coalescence

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1.單項選擇題The trend nowadays is to build the frame box as a separate fabricated construction and then, after stress relieving and machining the mating surfaces, to mount it on the （）.This has the advantage of saving weight.

A.seating
B.bedplate
C.entablature
D.cylinder block

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2.單項選擇題If the bedplate was too rigid, then as the hull flexed, the （）, which secure the engine into the ship would be likely to break, and there would be a danger of the bedplate cracking.

A.through bolts
B.jack bolts
C.holding down bolts
D.tap bolts

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3.單項選擇題The bedplate must be flexible enough to hog and sag with the foundation plate （） it is attached and which forms part of the ship’s structure.

A.in which
B.on which
C.to which
D.by which

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4.單項選擇題The fire drill must, as far as practicable, be conducted if （）.

A.there is a minor emergency
B.there is an actual emergency
C.there were a minor emergency
D.there were an actual emergency

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5.單項選擇題（）, the second one will start automatically.

A.If the first stand-by set failed
B.If the first stand-by set fails
C.If the first stand-by set will fail
D.If the first stand-by set doesn’t fail

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