An engineer, together with some motorm

1、The St.Lawrence and（）together form an

The St.Lawrence and（）together form an important transportation network for eastern Canada.Athe Mackenzie　Bthe Great LakesCthe Yukon　Dthe Hudson Bay

2、A diesel engine is equipped with an is

A diesel engine is equipped with an isochronous hydraulic governorA decrease in load will cause the engine speed to （）Adecrease onlyBincrease onlyCdecrease slightly then returned to original speedDincrease slightly then returned to original speed

3、People working together in an office u

People working together in an office used to ____________.A talk more about handwritingB take more notes on workdaysC know better one anothers handwritingD communicate better with one another

4、In an engine with air inlet valve and

In an engine with air inlet valve and exhaust valve on its cylinder heads the fresh air will enter into the cylinder （） and the gases exh...

5、In some diesel engine designs,（）the in

In some diesel engine designs,（）the injection of cylinder oil is timed to impinge when the piston and only impinge on（）Ais coming upward；cy...

6、The interior of some diesel engine sal

The interior of some diesel engine saltwater heat exchangers are protected from corrosion by the use of（）Aaluminum platesBlead cathodesCcopper baffle platesDsacrificial zinc