题目内容
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[单选题]
mountain（）
A.山脉
B.数量
C.克服
D.蒙太奇
提问人：网友154336271
发布时间：2022-09-30
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A、泰山Mount Tai
B、嵩山Songshan Mountain
C、衡山Heng Mountain
D、华山Huashan Mountain
E、恒山Mount Heng
F、黄山Mount Huangshan
G、庐山Lushan Mountain
题目内容
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更多“mountain（）”相关的问题
第2题
什么山脉为法国，阿尔萨斯（Alsace）产区抵挡了西边吹来的富含雨水的风？
A、比利牛斯山(les Pyrénées)
B、阿尔卑斯山脉（Alps）
C、孚日山脉（Vosges）
D、安第斯山脉（Andes mountain）
第6题
Please Fasten Your SeatbeltsSevere turbulence （湍流) can kill aircraft passengers. Now, in
Please Fasten Your Seatbelts
Severe turbulence (湍流) can kill aircraft passengers. Now, in test flights over the Rocky Mountains; NASA (美国航空航天局) engineers have successfully detected clear-air turbulence up to 10 seconds before an aircraft hits it.
Clear-air turbulence often catches pilots by surprise. Invisible to radar, it is difficult to forecast and can hurl (用力抛出去) passengers about the cabin. In December 1997, one passenger died and a hundred others were injured when unexpected rough air caused a United Airlines flight over the Pacific to drop 300 metres in a few seconds.
However, passengers can avoid serious injury by fastening their seatbelts. "It is the only antidote (对策) for this sort of thing," says Rod Bogue, project manager at NASA's Dryden Flight Research Center in Edwards, California.
The centre's new turbulence detector is based on lidar, or laser radar. Laser pulses are sent ahead of the plane and these are then reflected back by particles in the air. The technique depends on the Doppler effect. The wavelength of the light shifts according to the speed at which the particles are approaching. In calm air, the speed equals the plane's airspeed. But as the particles swirl (打漩) in rough air, their speed of approach increases or decreases rapidly. The rate of change in speed corresponds to the severity (激烈程度) of the turbulence.
In a series of tests that began last month, a research jet flew repeatedly. into disturbed air over the mountain ridges (山脉) near Pueblo, Colorado. The lidar detector spotted turbulence between 3 and 8 kilometres ahead, and its forecasts of strength and duration corresponded closely with the turbulence that the plane encountered.
Bogue says that he had "a comfortable amount of time" to fasten his seatbelt. The researchers are planning to improve the lidar's range with a more powerful beam. The system could be installed on commercial aircraft in the next few years.
What does "clear-air turbulence" probably mean？ (Paragraph 1)
A．A not very rough storm.
B．Unexpected disturbed air.
C．A kind of visible storm.
D．A storm over mountain ridges.
第7题
Please Fasten Your Seatbelts Severe turbulence （湍流) can kill aircraft passengers. Now,
Please Fasten Your Seatbelts Severe turbulence (湍流) can kill aircraft passengers. Now, in test flights over the Rocky Mountains, NASA (美国航空航天局) engineers have successfully detected clear-air turbulence up to 10 seconds before an aircraft hits it.
Clear-air turbulence often catches pilots by surprise. Invisible to radar, it is difficult to forecast and can hurl (用力抛出去) passengers about the cabin. In December 1997, one passenger died and a hundred others were injured when unexpected rough air caused a United Airlines flight over the Pacific to drop 300 metres in a few seconds.
However, passengers can avoid serious injury by fastening their seatbelts. “It is the only antidote (对策) for this sort of things,” says Rod Bogue, project manager at NASA’s Dryden Flight Research Center in Edwards, California.
The centre’s new turbulence detector is based on lidar, or laser radar, Laser pulses are sent ahead of the plane and these are then reflected back by particles in the air. The technique depends on the Doppler effect. The wavelength of the light shifts according to the speed at which the particles are approaching. In calm air, the speed equals the plane’s airspeed. But as the particles swirl (打漩) in rough air, their speed of approach increases or decreases rapidly. The rate of change in speed corresponds to the severity (激烈程度) of the turbulence.
In a series of tests that began last month, a research jet flew repeatedly into disturbed air over the mountain ridges (山脉) near Pueblo, Colorado. The lidar detector spotted turbulence between 3 and 8 kilometres ahead, and its forecasts of strength and duration corresponded closely with the turbulence that the plane encountered.
Bogue says that he had “ a comfortable amount of time” to fasten his seatbelt. The researchers are planning to improve the lidar’s range with a more powerful beam. The system could be installed on commercial aircraft in the next few years.
第6题：What does “clear-air turbulence” probably mean？ （Paragraph 1）
A．A not very rough storm.
B．Unexpected disturbed air.
C．A kind of visible storm.
D．A storm over mountain ridges.
第8题
根据下列材料，请回答题Please Fasten Your SeatbeltsSevere turbulence （潮流 can kill aircraft
根据下列材料，请回答题
Please Fasten Your Seatbelts
Severe turbulence （潮流 can kill aircraft passengers. Now， in test flights over the Rocky Mountains， NASA （美国航空航天局）engineers have successfully detected clear-air turbulence up to 10 seconds before an aircraft hits it.
Clear-air turbulence often catches pilots by surprise. Invisible to radar， it is difficult to fore- cast and can hurl （用力抛出去） passengers about the cabin. In December 1997， one passenger died and a hundred others were injured when unexpected rough air caused a United Airlines flight over the Pacific to drop 300 meters in a few seconds.
However， passengers can avoid serious injury by fastening their seatbelts. "It is the only antidote （对策）for this sort of thing，" says Rod Bogue， project manager at NASA"s Dryden Flight Research Center in Edwards， California. The centre"s new turbulence detector is based on lidar， or laser radar. Laser pulses are sent ahead of the plane and these are then reflected back by particles in the air. The technique depends on the Doppler effect. The wavelength of the light shifts according to the speed at which the particles are approaching. In calm air， the speed equals the plane"s airspeed. But as the particles swirl （打漩） in rough air， their speed of approach increases or decreases rapidly. The rate of change in speed corresponds to the severity （激烈程度）of the turbulence.
In a series of tests that began last month， a research jet flew repeatedly into disturbed air over the mountain ridges （山脉） near Pueblo， Colorado. The lidar detector spotted turbulence between 3 and 8 kilometers ahead， and its forecasts of strength and duration corresponded closely with the turbulence that the plane encountered.
Bogue says that he had "a comfortable amount of time" to fasten his seatbelt. The researchers are planning to improve the lidar"s range with a more powerful beam. The system could be installed on commercial aircraft in the next few years.
What does "clear-air turbulence" in Paragraph 1 probably mean？ 查看材料
A.A not very rough storm.
B.Unexpected disturbed air.
C.A kind of visible storm.
D.A storm over mountain ridges.
第9题
There was a house at ______A、the mountain footB、the foot of the mountainC、the feet of t
There was a house at ______
A、the mountain foot
B、the foot of the mountain
C、the feet of the mountain
D、the mountain's foot
第10题
_______ has been regarded as the sacred Mountain of Longevity by Chinese people.
A、Mountain Taishan
B、Mountain Huashan
C、Mountain Hengshan（恒山）
D、Mountain Hengshan（衡山）
第11题
As one of the seven mountains in the world,_____ is the largest hinterland in Eurasian Continent.
A、Qingling Mountain
B、Huangshan Mountain
C、Huashan Mountain
D、Tianshan Mountain
