违法和不良信息举报 联系客服
免费注册 登录

Hot air can hold（）.

题目
单选题
Hot air can hold（）.
A

less moisture than cold air

B

more moisture than cold air

C

the same amount of moisture as cold air

D

moisture independent of air temperature

如果没有搜索结果或未解决您的问题，请直接 联系老师 获取答案。
相似问题和答案

第1题：

Hygroscopic cargoes should be ventilated when ______.

A.going from a warm to a cold climate

B.the dew point of the outside air is greater than the dew point of the air in the hold

C.the dew point of the air in the hold is very low

D.the outside dew point is 16°C and the cargo temperature is 12°C


正确答案：A

第2题：

Should the steel be loaded in conditions where the ambient temperature is lower than might be encountered later on in the voyage，______．

A.the hold should be ventilated

B.the hold should not be ventilated

C.the hold should be half-ventilated

D.hot air should be introduced into the hold


正确答案：B

第3题：

Man has always wanted to fly.Even as long as eight hundred years ago, an Englishman had tried.He made a (1)of wings from chicken feathers and fixed them to his shoulders.Then he jumped om a tall building.As you can imagine, he did not fly very far.(2) he fell to the ground and broke several bones.The first real attempt at flying took place in France in 1783.The two Mongolian brothers knew that hot air rose.If they could

fill a large balloon(3)hot air, they thought it would rise into the air and fly.They were right.They made a very large hot air balloon of cloth and paper.It measured ten meters it diameter.They filled it with hot air and the balloon got two hundred meters into the air.It fell into earth about three kilometers away.

At the next attempt, they (4) passengers use a bal loon to rise into the air and fly.We do not know what the passengers fell about the trip as they were a cock, a duck, and a sheep But we (5) know that the trip lasted eight minutes and the animals landed safely.(完型填空)

A.Instead

B.Pair

C.Do

D.Arranged

E.With


参考答案：BAEDC

第4题：

The No.3 air cycle pack temperature indication is______hot.

A.being read
B.to read
C.reading
D.read

答案：C
解析：
本题考查动词的形式。
　　题目意为“3号空气循环机组温度指示为热状态。”read用来表示主语的某种状态时，可以用主语形式表示被动意义，也可以使用进行时态，由于空格前有is，选择C。
　　

第5题：

共用题干
Rockets in the Sky
If someone asked you,"What color is the sky?"I expect that you would answer,"Blue."I am afraid that you would be wrong.The sky has no color.When we see blue,we are looking at blue sunlight.The sunlight is shining on little bits of dust in the air.
We know that there is air all around the world.We could not breathe without air.Airplanes could not fly without air.They need air to lift their wings.Airplanes cannot fly very high because as they go higher the air gets thinner.If we go far enough away from the earth,we find there is no air.
What is the sky?The sky is space.In this space there is nothing except the sun,the moon and all the stars. Scientists have always wanted to know more about the other worlds in the space.They have looked at them through telescopes and in this way they have found out a great deal.The moon is about 384 ,000 kilometers away from the earth.An airplane cann't fly to the moon but there is a thing that can fly even when there is no air. This is rocket.
I am sure that you are asking,"How does a rocket fly?"If you want to know,get a balloon and then blow it up until it is quite big.Do not tie up the neck of the balloon.Let go!The balloon will fly off through the air very quickly.The air inside the balloon tries to get out.It rushes out through the neck of the balloon and this pushes the balloon through the air.It does not need wings like an airplane.
This is how a rocket works.It is not made of rubber（橡胶）like a balloon,of course.It is made of metal. The metal must not be heavy but it must be very strong.There is gas inside the rocket which is made very hot. When it rushes out of the end of the rocket,the rocket is pushed up into the air.
Rockets can fly far out into space.Rockets with men inside them have already reached the moon.Several rockets,without men inside them,have been sent to other worlds much farther away.One day rockets may be able to go anywhere in the space.

A rocket is pushed up into the air when.
A:hot gas rushes out of its head
B:it is powered by gas
C:hot gas rushes out of its bottom
D:hot gas rushes out of its neck

答案：C
解析：
根据第一段第四句可知，天空没有颜色。
根据第二段第五句“Airplanes cannot fly very high because as they go higher the air gets thinner.”可知，由于位置越高，空气越稀薄，飞机飞不了太高。
根据第五段可知，火箭飞行的原理与没扎口的膨胀的气球相似。
根据第六段最后一句“When it rushes out of the end of the rocket , the rocket is pushed upinto the air.”可知，火箭是由热气流高速向后喷出所产生的反作用力来推动的，而不是由内部燃烧的气体推动的。
根据第六段最后一句可知，当热气从火箭尾部冲出时，火箭被送人空中。C项中的“itsbottom”是第六段最后一句中的“the end of the rocket”的同义转换。

第6题：

Sweat damage will occur in a cargo hold containing machinery parts when ______.

A.the outside air is colder than the cargo．

B.the air temperature of the hold is higher than the outside air temperature．

C.the dew point of the hold is higher than the temperature of the cargo．

D.the dew point of the outside air is lower than the temperature of the cargo


正确答案：C

第7题：

The moisture equilibrium chart can be used to determine the ______．

A.Absolute moisture content of the air surrounding a hygroscopic cargo when moisture equilibrium exists

B.Dew point temperature that the air surrounding a hygroscopic commodity will have when in moisture equilibrium with that commodity

C.Enthalpy of the air surrounding a hydroscopic cargo which is in moisture equilibrium with the cargo

D.Temperature at which moisture equilibrium will occur in a cargo hold containing a hygroscopic cargo


正确答案：B

第8题：

What can be used to separate cargo in a hold?


正确答案：Dunnage. Such as plank, canvas, mattress, wires, and so on.

第9题：

Air Bus’ world-renowned hot-section engineering______the needs of industrial gas turbine customers.

A.replies
B.answers
C.frees
D.addresses

答案：D
解析：
本题考查动词词义辨析。
　　题目意为“国际知名的航空客车热区工程满足了工业燃气轮机客户的需求。” A选项“回复”，B选项“回答”，C选项“放飞”，D选项“解决，处理”。address the needs of 固定搭配，“满足……的需要”。
　　

第10题：

Which of the following is a reason why Bob, a technician, should install case fans in the front of acomputer case?（）

  • A、It forces hot air out of the PC
  • B、The fan is easier to remove and clean
  • C、It forces cooler air into the power supply quickly
  • D、It forces cooler air across the motherboard

正确答案:D

更多相关问题
相关内容