题目内容
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The passenger called the young man back because ______ .
A．he wanted to help the young man
B．he wanted to make friends with the young man
C．he wanted to punish(惩罚)the young man for his bad behaviour(举止)
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更多“The passenger called the young…”相关的问题
The passenger who called him back wanted to ______.
A．return two bags to him
B．get off the train with him
C．punish him for his rudeness
D．have a talk with him about his behavior
A.proto-oncogenes.
B.tumor-suppressor genes.
C.passenger genes.
D.inhibitor genes.
E.driver genes.
Floors aboard ship are ______．
A.also called decks
B.vertical transverse plates connecting the vertical keel with the margin plates
C.large beams fitted in various parts of the vessel for additional strength
D.found in passenger and berthing spaces only
The big building in which passengers wait for their plane is called the【C8】______When a passenger arrives 34 the terminal, he goes to the airline【C10】______has arranged his trip. There he【C11】______his ticket as【C12】______that he has a seat in the plane. He also【C13】______his heavy luggage to【C14】______and sent to the hold of the aircraft. The passenger is allowed to carry only light articles with him. If his ticket is in order, and his luggage is not【C15】______, he is given a card called a【C16】______pass which allows his admission【C17】______the plane. However, he can not proceed to the aircraft【C18】______he【C19】______an announcement over the loudspeakers that his plane is about to【C20】______
【C1】
A．only
B．even
C．lastly
D．ever
【21】
A．a
B．the
C．an
D．some
Air Transportation
Nature of the Industry
Air travel in the United States grew at a rapid pace until 2001, expanding from 172 million passengers in 1970 to nearly 642 million in 2003. However, over the next 3 years, a combination of factors--including the events of September 11, 2001, and an economic recession--combined to reduce traffic to 1996 levels. Nevertheless, air travel remains one of the most popular modes of transportation.
Airlines transport passengers and freight over regularly scheduled routes or on routes. Several classes of airlines function in the United States. As of 2004, there were 15 major airlines---12 passenger and 3 all cargo--which the U.S. Department of Transportation defines as having operating revenues of more than ＄1 billion. The largest of these, often called the Big Six, generally have a hub and also fly internationally. A hub is a centrally located airport designated by an airline to receive a large number of its flights from many locations, and at which passengers can transfer to flights to any of the locations served by the airline system. In this way, the greatest number of passengers, from as many locations as possible, can be served in the most efficient way with a given set of resources.
In competition with the Big Six are low-cost, low-fare carriers. These carriers have traditionally not used hub and spoke systems and have offered flights between limited numbers of cities. They primarily have focused on flying shorter routes (400 miles or less) and on serving leisure travelers. But some low-fare carriers are expanding their routes to include longer transcontinental and nonstop flights. These moves have helped low-fare carriers expand their customer base to include more business travelers.
Another type of passenger airline carrier is the commuter or regional carrier. As of 2004, there were approximately 75 of these carriers. Regional airlines operate short-and medium-haul scheduled airline service connecting smaller communities with larger cities and with hubs. Some of the largest regional carriers are subsidiaries of the major airlines, but most are independently owned, often contracting their services to the majors. The regional airlines fleet consists primarily of smaller 19- to 68-seat turboprop and 40- to 70-seat jet aircraft. The regional airlines are the fastest growing segment of commercial aviation with I out of every 7 domestic airline passengers flying on a regional airline during at least part of his or her trip.
Air cargo is another sector of the airline industry. Cargo can be carried in cargo holds of passenger airlines or on aircraft designed exclusively to carry freight. Cargo carriers in this industry do not provide door-to-door service. Instead, they provide only air transport from an airport near the cargo's origin to an airport near the cargo destination. Companies that provide door-to-door delivery of parcels either across town or across the continent are classified in the couriers and messengers industry.
Most sectors of the airline industry were in a downturn in 2002, with several passenger airlines having declared bankruptcy and others on the verge of doing so. After 6 relatively successful years in the late 1990s, fueled by an increase in passenger volume and a booming economy, the growth in airline passenger traffic began to slow in 2001, coinciding with the economic recession. After the tragic events of September 11, 2001, passenger traffic dropped steeply, causing airlines to cut flights, lay off workers, and park surplus aircraft. Although passenger volume has since recovered somewhat, the growth rate in the industry will likely continue to be depressed for several years.
As the low-fare airlines continue to compete and gain market share over the higher-cost major airlines, and as passenger traffic remains lower, managing costs has become mor
A．Y
B．N
C．NG
ort, and convenience. These cars will float along never touching the ground, and therefore will have no need for wheels. Annoying highway vibrations, caused by the rotations of the disc-and-tire wheels, will be things of the past. The coming highway passenger cars will literally fly above the road, supported on columns of air compressed by
turbine-driven fans.
The car without wheels has been called a “flying car” , and, in a sense, that’ s just what it is; however, it will not back out of the family garage, start down the street, and then suddenly go quickly upward heading for some distant point. On the contrary, to avoid problems in aerial navigation, the wheel-less vehicle probably will travel no more than three inches above road surface. It will travel over fairly rough road and even over smooth water.
The inevitable problems of maritime regulations, severe weather conditions, and running out of fuel in remote areas all will require new concepts of operation, servicing, and vehicle regulation.
1.The author believes that cars of the future _______ .
A、will be replaced by airplanes
B、will have wheels unlike those of today
C、will u s e columns of air instead of wheels
D、will u s e wheels without tires
2.Cars of the future will run _______ .
A、without annoying noise
B、without fuel
C、much more smoothly
D、on a number of fans
3.The car without wheels has been called a “flying car” because _______ .
A、it travels a few inches above the ground
B、it can fly as a plane does
C、it moves at a very high speed
D、it can travel over smooth water
4.Where is a wheel-less car least fit to travel_____ .
A、Over soft land
B、Over rough country roads
C、Over highways
D、Over waterfalls
5.Wheel-less cars will _______ .
A、eliminate all traffic problems
B、create new traffic problems
C、eliminate parking problems
D、both A and C
Given a certain power of engine, and consequently a certain fuel consumption, there is a practical limit to the total weight of an aircraft that can be made to fly. Out of that weight as much as possible is wanted for fuel, radio navigational instruments, passenger seats, or freight room, and of course, the passengers or freight themselves. So the structure of the aircraft has to be as small and light as safety and efficiency will allow." The designer must calculate the normal load that each part will bear. This specialist is called the "stress man". He takes account of any unusual stress that may be put on the part as a precaution against errors in manufacture, accidental damage, etc.
The stress man's calculations go to the designer of the part, and he must make it as strong as the stress man says is necessary. One or two samples are always tested to prove that they are as strong as the designer intended. Each separate part is tested, then a whole assembly—for example, a complete wing, and finally the whole aeroplane. When a new type of aeroplane is being made, normally only one of the first three made will be flown. Two will be destroyed on the ground in structural tests. The third one will be tested in the air.
When a plane has passed all the tests it can get a government certificate of airworthiness, without which it is illegal to fly, except for test flying.
Making the working parts reliable is as difficult as making the structure strong enough. The flying controls, the electrical equipment, the fire precautions, etc. must not only be light in weight, but must work both at high altitudes where the temperature may be below freezing point and in the hot air of an airfield in the tropics.
To solve all these problems the aircraft industry has a large number of research workers, with elaborate laboratories and test houses, and new materials to give the best strength in relation to weight are constantly being tested.
The two main requirements of aircraft design are______.
A．speed and cost
B．reliability and passenger comfort
C．lightness and dependability
D．ability to stay up in the air and reliability
What is the subject of the article？
A．The side effects of some medicines.
B．The causes of hearing loss.
C．The function of the ears.
D．The effects of flying on hearing.
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