单项选择题
A.Air must be admitted；without B.Oil must be injected；without C.Air must be admitted；with D.Oil must be injected；with
When the fuel oil is burning in the combustion chamber,...
单项选择题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
After the ship is out of the harbour and in “Full Speed...
单项选择题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
A diesel engine burns （） a gasoline engine of the same ...
单项选择题A diesel engine burns （） a gasoline engine of the same capacity in the same period of time.
A.as much fuel as B.less fuel than C.less fuel as D.more fuel than
