Travel is exciting and summer is a busy period for holiday travel. Many people will travel great distances in airplanes, cars or other vehicles. Experts say people should know about other health problems that can strike when traveling by air.

One of these is a condition called hypoxia (缺氧癥). It results from a lack of oxygen to the brain. Experts say the body begins losing oxygen minutes after an airplane leaves the ground. The air pressure in a plane during flight is lower than at sea level. This makes it more difficult for the body to effectively use the same amount of oxygen as it would on the ground. Fewer oxygen molecules （分子） cross the tissues (組織) in the lungs and reach the bloodstream.

The result is a five to twenty percent drop in the amount of oxygen in the blood. This reduces the amount of oxygen that reaches the organs of the body.

One effect of this lack of oxygen to the brain is a headache. When this happens, the heart attempts to fix the situation by beating harder and faster. This can make the traveler feel tired.

These signs of hypoxia are not dangerous in a healthy person. But a drop in oxygen level can cause a health emergency in people with heart or lung problems. They might lose consciousness or even suffer a heart attack.

Experts say that smoking cigarettes and drinking alcoholic liquids also reduce the body’s ability to use oxygen. So they suggest that people not drink alcohol or smoke cigarettes either before or during a flight. They also say persons with heart or lung problems should seek advice from their doctors before flying.

63. The author writes the passage mainly to __________.

A. warn people in airplanes of possible dangers

B. offer some advice on avoiding health problems

C. explain the causes and effects of hypoxia

D. advise people not to smoke or drink alcohol

64. According to the passage, what leads to hypoxia?

A. The brain lacks enough oxygen.       

B. The air pressure in a plane is too high.

C. Our body needs less oxygen during takeoff.

D. The bloodstream contains no oxygen molecules.

65. The underlined part “fix the situation” means “_________”.

A. use more oxygen it needs                        B. increase the air pressure

C. reduce the amount of blood              D. bump more blood to the brain

66. Why should passengers not smoke or drink before flying?

A. They weaken the body’s ability to use oxygen.

B. Smoking may pollute the air inside the airplane.

C. Drinking alcohol may raise one’s blood pressure.

D. Drinking is forbidden at the airport.

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科目：高中英語(yǔ) 來(lái)源：學(xué)習(xí)高手必修一英語(yǔ)人教版 人教版 題型：053

根據(jù)短文完成下面的題

My Unforgettable Travel

　　Besides going by car, there are three other ways to get across the country：planes, trains and buses．Air travel is the most expensive of the three but in many ways the easiest and most comfortable．There are hundreds of flights a day criss-crossing the country, and it is easy to make an order．You will get to your destination(目的地)quickly and find the services(服務(wù))at the airports excellent．There will be connecting bus services to the center of town, car rental agencies and porters(出租公司和搬運(yùn)工)．

　　Traveling by train is cheaper than by airplane．In the past, train service was poor but in recent years the government has changed the service with AMTRAK, the nationalized train system．You can travel first or second class．Your ticket is for the journey only, sleeping and dining conditions will be extra．The most inexpensive way to travel is by bus．Continental railways and Greyhound can buy special tickets that allow you unlimited travel for a certain period of time．In this way you can stop along the way to visit the places that interest you most．

　　If you do travel long distances, be ready for the time changes．There are four time zones(時(shí)區(qū))in the continental USA, starting on the East Coast with Eastern Standard Time(EST), then moving west to Central Standard Time(CST), Mountain Standard Time(MST)．If you travel east to west, you gain one hour each time you enter a new time zone．

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　　A good way to see the USA is by car．Americans love their cars and in the past fifty years they have developed a vast network of roads and freeways to help them reach their destinations．

　　As few visitors have their own cars, renting one is the next best thing．You will need a valid driver’s license(it is best to have an international driver’s license)and either international credit cards(信用卡)(Diners, American Express), or a deposit(存折)．

　　You should start out with a working knowledge of the road．You travel from state to state and this can be very exciting to a newcomer．For example, in some states it is legal(合法)to turn right at a red light if there is no closing traffic, while in other states you will be fined(罰款)for this action．

　　People can enjoy vast(廣袤的)areas of wild beauty．Throughout the country, animal and plant life is now protected by law, Americans are learning to be conservationists(天然資源保護(hù)者)．

(1)

The 1st paragraph is told about ________．

[　　]

A．

car is more expensive

B．

there are four ways to travel

C．

the service is a little good

D．

ordering tickets is not easy

(2)

Which do you think it is a better way if you are allowed to travel or stop along the way for some time without limit?

[　　]

A．

train

B．

car

C．

bus

D．

ship

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If you walk at the red light on the road in some states you feel ________, and see some plants and animas ________．

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Since life is short and the world is wide, the sooner you start exploring it, the better. Soon enough the time will come when you are too tired to move farther than the terrace of the best hotel. Go now.

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Amtrak is the national provider of train transportation in the United States．In the past ten years，the number of its passengers has increased by eighteen percent．Although the number of passengers has increased，it is still very small now．In countries such as France，Germany，or Japan，more people use trains．
There are several reasons why many people __________________________．
Firstly，Americans love to drive their own cars．On highways，cars can travel as fast as trains．These highways connect all major cities in America．Secondly，many travelers like to be independent．When they use their own cars they can decide when to travel．Thirdly，many buses travel between major cities．Bus travel is less costly than train travel.
In a huge country like the United States，cities are far away from each other．In some cases，travel from one city to another by train may take more than a day．Airplanes can carry passengers over long distances much faster．People who do not want to spend long time traveling by train decide to fly．For these people saving time is the most important thing.
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【小題2】Which sentence in the passage can be replaced by the following one?
It’s convenient for people to decide the start-off time when they travel in their own cars.
【小題3】Please fill in the blank in the fourth paragraph with proper words or phrases to complete the sentence.（Please answer within 10 words.）
【小題4】What means of transportation do you like best when traveling，trains，cars，or planes? Why? （Please answer within 30 words）
【小題5】Translate the underlined sentences in the last paragraph into Chinese.

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