单项选择题
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
Since the engine doesn’t work well, you’d better （） as ...
单项选择题Since the engine doesn’t work well, you’d better （） as soon as possible.
A.reduce its speed B.find out its trouble C.eliminate its trouble D.all the above
