Pipes made of plastic are now widely u

1、For what purpose are the diving pipes

For what purpose are the diving pipes used?A To absorb heat from the sun.B To store heat for future use.C To turn solar energy into heat energy.D To carry heat down below the surface.

2、Which of following interface are not u

Which of following interface are not using CCS7 protocol？（）AGnBGdCGsDGr

3、Large pipes or （） are fitted between t

Large pipes or （） are fitted between the steam and water drums to ensure good natural circulation of water.Afire-tubesBfurnacesCdown-comersDsoot-blower

4、When are you allowed to throw plastic

When are you allowed to throw plastic garbage overboard?（）ABeing mroe than 25 miles from shoreBOnly at night when it‟s darkCBeing more than 6 miles from shoreDNever

5、Telescopic pipes to the piston of a la

Telescopic pipes to the piston of a large slow-speed main propulsion diesel engine are designed to prevent （）.Aexcessive crankcase pressureBexce...

6、The fire of burning plastics is classi

The fire of burning plastics is classified as （） fire.AClass ABClass BCClass CDClass D