The first period if the party system r

1、The Consol navigation system，used in R

The Consol navigation system，used in Russian and Northern European waters，can be used（）.Afor precise navigation in coastal watersBby measuring ...

2、In a refrigeration system, if the cool

In a refrigeration system, if the cooling water to the condenser fails, the（）.Abox temperature solenoid valve will closeBexpansion valve will closeCcompressor will shutdownDking valve will ope

3、During the valve overlap period, the e

During the valve overlap period, the exhaust pressure of a turbochargers, four-stroke/cycle diesel engine must be less than the intake manifold ...

4、When the wave period and the apparent

When the wave period and the apparent rolling period are the same（）.Asynchronous rolling occursBroll period decreasesCroll period increasesDroll amplitude is dampened

5、The longer the ignition delay period r

The longer the ignition delay period resulting from improper use of low cetane fuel, the （）Aless fuel will enter the cylinderBhigher the cylinder combustion temperatureCmore complete the fuel combustionDmore rapid the rise in combustion pressure

6、If the engine （） for a long period, th

If the engine （） for a long period, there will be a danger of frost.Amust to stand inoperativeBhas to stand inoperativeCmust be stood idleDwill stand idle