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單項(xiàng)選擇題

（） into the cylinder because no fuel can burn （） it.

A.Air must be admitted；without
B.Oil must be injected；without
C.Air must be admitted；with
D.Oil must be injected；with

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單項(xiàng)選擇題

When the fuel oil is burning in the combustion chamber, it （）.

A.gives up large amount of heat
B.gives off large amount of heat
C.gives up large amount of steam
D.gives off large amount of steam

單項(xiàng)選擇題

After the ship is out of the harbour and in “Full Speed”, well change （）.

A.to fuel oil instead of diesel oil
B.for fuel oil instead of diesel oil
C.to diesel oil into fuel oil
D.for diesel oil into fuel oil

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