A．An engine room.B．A big kitchen.C．A great theatr

A supercharged engine differs from an un－supercharged engine it operates at an increases pressure.

Before starting a diesel engine that has an engine driven lube oil pump, the engineer shou

At the back of the theatre was the bar with a half－glass______ to separate the drinkers an

Before starting an engine by air, the engine must .A.be turned by a turning gear for at le

What does the womans father do？A．An architect.B．An engineer.C．An artist.D．A scientist.

The engineers Amade two big plans Bfor the dam,one of Cwhat was never put Din use.A．B．C．D．