网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
单选题
（）reters to be amount of water vapour in the air.
A
Humidity
B
Temperature
C
Precipitation
D
Wind
参考答案
参考解析
解析：
暂无解析
更多 “单选题（）reters to be amount of water vapour in the air.A HumidityB TemperatureC PrecipitationD Wind” 相关考题
考题
We drop a piece of metal into a jar full of water, the metal will float if it weighs less than______.A. an equal amount of silverB. an equal amount of goldC. all the water in the jar nowD. the water that leaves the jar
考题
When water( ), it will be changed into vapour.A. is heatedB. was heatedC. will be heatedD. would heated
考题
One advantage of the all-purpose nozzle is that it ______.A.can fit any size hoseB.converts a stream of water into a fogC.increases the amount of water reaching the fireD.can spray two streams of water at the same time
考题
In a diesel engine closed freshwater cooling system, the amount of coolant flowing through the heat exchanger is controlled by the __.A.suction pressure regulatorB.thermostatic bypass valveC.sea water temperatureD.water level in the expansion tank
考题
High diesel engine cooling water temperatures can be caused by ______.A.air in the cooling systemB.an overhauled water pumpC.correct amount of coolantD.no air in the cooling system
考题
Which statement about damage control is TRUE ________．A.A hole in the hull at the waterline is more dangerous than a hole below the inner bottomB.The amount of water entering a ship through a hole varies inversely to the area of the holeC.Water flowing into a lower compartment on a ship is more dangerous than water on deck or flowing into an upper compartmentD.Water flowing over the forecastle bulwark is more dangerous than a hole in the hull at the waterline
考题
When a tank is to be gas freed after washing，the concentration of hydrocarbon vapour should be reduced by purging the inerted cargo tank with ______．A.the oxygenB.the gasC.the inert gasD.the hydrocarbon vapour
考题
Which of the following statements is TRUE according to the passage?___________A.Oceanic salinity has great effect on sea life
B.Many factors combine to cause changes in oceanic salinity
C.The movement of the water is related to the amount of salt
D.The temperature of the water has much to do with the oceanic salinity
考题
For decades，farmers and environmentalists in California have been entangled in a______over laws that limit the amount of water diverted from rivers and streams for irrigation。
A.dispute
B.register
C.conflict
D.negotiation
考题
共用题干
第一篇Water Resources on the EarthThe second most important constituent（构成成分）of the biosphere（生物圈）is liquid water. This can only exist in a very narrow range of temperatures,since water freezes at 0℃and boils a 100℃．Life as we know it would only be possible on the surface of a planet which had temperature: somewhere within this narrow range.The earth's supply of water probably remains fairly constant in quantity.The total quantity of water is not known very accurately,but it is about enough to cover the surface of the globe to a depth of about two and three-quarter kilometers.Most of it is in the form of the salt water of the oceans一about 97 percent. The rest is fresh.But three-quarters of this is in the form of ice at the poles and or mountains and cannot be used by living systems until melted.Of the remaining fraction,which h somewhat less than one percent of the whole.There is 10—20 times as much stored underground water as there is actually on the surface.There is also a tiny,but extremely important fraction of the water supply which is present as water vapour in the atmosphere.Water vapour in the atmosphere is the channel through which the whole water circulation（循环） of the biosphere has to pass.Water evaporated（蒸发）from the surface of the oceans,from lakes and rivers and from moist（潮湿的）earth is added to it. From it the water comes out again as rain or snow,falling on either the sea or the land. There is,as might be expected, a more intensive evaporation per unit area over the sea and oceans than over the land,but there is more rainfall over the land than over the oceans and the balance is restored by the run off from the land in the form of rivers.The word"fraction"in the second paragraph means________.A:a large areaB:a very small amountC:an important systemD:a major source of information
考题
共用题干
第一篇Water Resources on the EarthThe second most important constituent（构成成分）of the biosphere（生物圈）is liquid water. This can only exist in a very narrow range of temperatures,since water freezes at 0℃and boils a 100℃．Life as we know it would only be possible on the surface of a planet which had temperature: somewhere within this narrow range.The earth's supply of water probably remains fairly constant in quantity.The total quantity of water is not known very accurately,but it is about enough to cover the surface of the globe to a depth of about two and three-quarter kilometers.Most of it is in the form of the salt water of the oceans一about 97 percent. The rest is fresh.But three-quarters of this is in the form of ice at the poles and or mountains and cannot be used by living systems until melted.Of the remaining fraction,which h somewhat less than one percent of the whole.There is 10—20 times as much stored underground water as there is actually on the surface.There is also a tiny,but extremely important fraction of the water supply which is present as water vapour in the atmosphere.Water vapour in the atmosphere is the channel through which the whole water circulation（循环） of the biosphere has to pass.Water evaporated（蒸发）from the surface of the oceans,from lakes and rivers and from moist（潮湿的）earth is added to it. From it the water comes out again as rain or snow,falling on either the sea or the land. There is,as might be expected, a more intensive evaporation per unit area over the sea and oceans than over the land,but there is more rainfall over the land than over the oceans and the balance is restored by the run off from the land in the form of rivers.Most of the fresh water on Earth________.A:is in the form of ice at the poles and on mountainsB:is stored undergroundC:is found in rivers and lakesD:comes from the rain
考题
共用题干
第一篇Water Resources on the EarthThe second most important constituent（构成成分）of the biosphere（生物圈）is liquid water. This can only exist in a very narrow range of temperatures,since water freezes at 0℃and boils a 100℃．Life as we know it would only be possible on the surface of a planet which had temperature: somewhere within this narrow range.The earth's supply of water probably remains fairly constant in quantity.The total quantity of water is not known very accurately,but it is about enough to cover the surface of the globe to a depth of about two and three-quarter kilometers.Most of it is in the form of the salt water of the oceans一about 97 percent. The rest is fresh.But three-quarters of this is in the form of ice at the poles and or mountains and cannot be used by living systems until melted.Of the remaining fraction,which h somewhat less than one percent of the whole.There is 10—20 times as much stored underground water as there is actually on the surface.There is also a tiny,but extremely important fraction of the water supply which is present as water vapour in the atmosphere.Water vapour in the atmosphere is the channel through which the whole water circulation（循环） of the biosphere has to pass.Water evaporated（蒸发）from the surface of the oceans,from lakes and rivers and from moist（潮湿的）earth is added to it. From it the water comes out again as rain or snow,falling on either the sea or the land. There is,as might be expected, a more intensive evaporation per unit area over the sea and oceans than over the land,but there is more rainfall over the land than over the oceans and the balance is restored by the run off from the land in the form of rivers.There is more of rainfall________.A:over the mountains than over the riversB:over the rivers than over the mountainsC:over the land than over the oceansD:over the oceans than over the land
考题
单选题One advantage of the all-purpose nozzle is that it（）.A
can fit any size hoseB
converts a stream of water into a fogC
increases the amount of water reaching the fireD
can spray two streams of water at the same time
考题
单选题The rate of heat transfer in a water-tube auxiliary boiler can be increased by （）.A
operating the boiler at less than normal water levelB
installing fins on the firesides of water-tubesC
increasing the amount of excess air to the burnersD
treating the boiler water with chemical oxygen scavengers
考题
单选题An excessive amount of water is prevented from entering a vessel using a water lubricated stern tube bearing by the use of the （）.A
propeller hubB
lignum vitaeC
shaft packingD
labyrinth seal
考题
单选题Higher than normal jacket water temperatures occurring in all cylinders of a diesel engine can result from a/an （）.A
oil suction line restrictionB
correct amount of coolantC
cavitation erosion in the water jacketsD
clogged sea suction strainer
考题
单选题When distilling salt water the cooling water discharging from the distiller is fed back to evaporator as feed water （）.A
to cut down the amount of cooling water neededB
to prevent an excess amount of cooling water from being discharged to the bilgesC
to supply hot water to the evaporator for more economical operationD
None of the above is tree
考题
单选题The amount of heat released by steam when it changes to water at the same temperature is called（）.A
latent heat of condensationB
latent heat of vaporizationC
latent heat of saturationD
sensible heat of condensation
考题
单选题The amount of chloride content in the water of an auxiliary boiler can be reduced by（）A
adding hydrazineB
blowing down the boilerC
adding phenolphthaleinD
adding a sulfite chloride scavenger
考题
单选题When a refrigeration compressor has developed a high head pressure as a result of a refrigerant overcharge, you should （）.A
increase the amount of cooling water to the condenserB
decrease the amount of cooling water to the condenserC
add more refrigerant to the systemD
remove some refrigerant from the system
考题
单选题Which would you NOT use to report the amount of anchor chain out? Three shots（）.A
at the water's edgeB
on deckC
on the bottomD
well in the water
考题
单选题Disastrous explosions have been caused by accumulations of oil or oil vapour in air lines not drainedAccording to the above sentence, which of the following statements is true?（）A
Oil vapour in air piping are dangerousB
Explosion will cause oil vapouring in air linesC
Oil vapour in air piping should be drainedD
Oil in air piping should not be drained
考题
单选题The feed water to the boiler will comprise （）.A
condensateB
a small amount of make-up feedC
A and BD
None of the above
考题
单选题What are transported mainly by water? （）A
Raw materialsB
Heavy, bulky and low value commoditiesC
Semi-processedD
Great amount goods
考题
单选题Allowance for fresh water refers to（）.A
the provision to be provided when the vessel sails in fresh water areaB
the fresh water to be carried by a vesselC
the allowance of fresh water for each crew member when in distress at seaD
the amount of free board decreased when sailing in fresh water area
考题
单选题One function of the thermal expansion valve is to（）A
act as a pilot from the solenoid valveB
regulate the amount of refrigerant flow to the coilC
regulate the water flowD
turn the compressor off and on
考题
单选题If the compressor-discharge temperature is higher than the receiver temperature（）A
increase the amount of cooling water to the condenserB
decrease the amount of cooling water to the condenserC
add more refrigerant to the systemD
remove some of the refrigerant from the system
热门标签
最新试卷