The （）(天窗) admits light and fresh air through.A、skylightB、bulwarkC、keelD、bulkhead
The （）(天窗) admits light and fresh air through.
- A、skylight
- B、bulwark
- C、keel
- D、bulkhead
相关考题：
—May I open the window to let in some fresh air ?—___________A. Come on B. Take care C. Go ahead! D. Hold on!
In Leon Nacson’s view, air and water are our Number One priorities for the following reasons except ().A、he cannot understand why people are polluting air and waterB、there will definitely be no fresh air and clean water for future generationsC、we would run out of air and water if we didn’t stop polluting themD、air and water polluting are the current and futu
Heating，ventilating，and air conditioning（HVAC） systems are______in most of underground subway stations to provide comfortable and fresh air to underground subway stations。A.assembledB.installingC.equippedD.installed
If headaches only occur at night,lack of fresh air is often the cause.A:start B:begin C:happen D:visit
If headaches only occur at night,lack of fresh air is often the cause.A:start B:begin C:happen D:visit
We should take （）to keep the chemicals away from fire.A、great careB、some measuresC、fresh waterD、fresh air
单选题The fresh air coming in through the inner air ports, is compressed by（） to a higher pressure.Athe cylinder headBthe cross-headCthe moving pistonDthe stationary piston
单选题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 exhaust （）, there being an adequate overlap between the inlet opening and the exhaust closing.Adownwards；upwardsBupwards；downwardsCdownwards；downwardsDupwards；upwards
单选题Scavenging is （） of exhaust gases by blowing in fresh air.Athe suctionBthe compressionCthe removalDthe deliver
单选题The air distributor is conventionally driven by（） and distributes into each cylinder by（） certain sequence.Acamshaft；fresh airBcamshaft；starting airCelectronic motor which is controlled by a computer；fresh airDelectronic motor which is controlled by a computer；starting air
单选题Modem engines make use of exhaust gas driven turbo-chargers to supply pressurized fresh air for （） and supercharging.AscavengingBstartingCcoolingDblowing
单选题The term diesel engine scavenging means（）Adelivering more air into the cylinder than it would normally receive during an ordinary charging processBforcing the products of combustion out of the cylinder with the fresh air chargeCcollecting the air charge at the cleanerDcombustion and expansion of hot gas
单选题Gas exchange, which is a basic part of the cycle of an internal combustion engine, is（）Athe supply of normal air and removal of compressed airBthe supply of fuel oil and combustion of the atomized oilCthe supply of fresh air and removal of exhaust gasesDthe supply of fresh air and removal of the extra heat
单选题Most air conditioning units have （） for adjusting the ratio of recirculated fresh airCare must be taken not to reduce the fresh air so that stuffiness or smells arise.Acatch platesBdampersCregulating valvesDfans
单选题What is the passage mainly about?AHow to fight air pollution in big cities.BHow to avoid air pollution in big cities.CHow to breathe fresh air in big cities.DHow serious air pollution is in big cities.
单选题To prevent the unnecessary loading of an air conditioning system while maintaining the designed dry bulb temperature and relative humidity in an air conditioning system, you should （）Aadmit only enough fresh outside air to provide proper ventilationBreduce the air reheating system loadClower the compressor head pressureDoperate the purge recovery unit continuously
单选题In a two-stroke/cycle diesel engine, the exhaust gases are expelled from the cylinder by the（）Aexhaust manifoldBvalve bridgeCpressure of the fresh air chargeDvalve adjusting gear
单选题In a four-stroke/cycle diesel engine, after the completion of the power stroke, the piston will move（）Aup and draw in a fresh air chargeBdown to burn off fuelCdown to compress the fuel air chargeDup and force out the exhaust gases
单选题A charge of fresh air is drawn into the engine cylinder and then （） by the moving piston（） very high pressure.Apressed；toBpressurized；withCpushed；inDcompressed；to
单选题The process to remove exhaust gases by blowing in fresh air is called （）.AchargingBsuperchargingCstartingDscavenging
单选题（） is (are) not power supplied by main switchboard directly.ASteering gear and windlassBNavigation light and radio power panelCNavigation device power boxDDaily fresh water pump