The air in big cities very dirty by factories. A. are often made B. is often made C. have often madeD. has often made 题目和参考答案——青夏教育精英家教网—

题目内容

The air in big cities _____very dirty by factories.

A. are often made B. is often made C. have often madeD. has often made

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B．the problems a diver faces in deep sea.

C．air pressure under the surface of sea water.

D．a kind of illness that man suffers in the sea.

【小题2】The text does not say so, but it makes you think that ____________.

A．deep-sea divers should be in good health.

B．divers explore the deep sea only for treasure.

C．there is

a special mixture of gases under the sea.

D．diving under the water too quickly causes a kind of illness.

【小题3】Why does a diver get the bends?

A．The air in his blood is used up.	B．His diving suit weighs too much.
C．He comes to the surface too quickly.	D．He tries to do exercise under the sea.

The sea has always interested man. From it he can get food, minerals, and treasure. For thousands of years, he could sail on it. But he could not go far beneath its surface.
Man wants to explore deep into the sea. However, he is not a fish. He must breathe air, so he can’t stay under the water’s surface for any length of time. To explore deep water, man faces even more dangers and problems.
A diver who wants to stay under water for more than a few minutes must breathe air or a special mixture of gases. He can wear a diving suit and have air pumped to him from above. He can carry a tank of air on his back and breathe through a hose(软管) and a mouthpiece. Water weighs 800 times as much as air. Tons of water pushes against a diver deep in the sea. His body is under great pressure.
When a diver is under great pressure, his blood takes in some of the gases he breathes. As he rises to surface, the water pressure becomes less. If the diver rises too quickly, the gases in his blood form bubbles(气泡). The diver is then suffering from the bends(潜函病). The bends can cause a diver to double up in pain. They can even kill him.
60. On the whole, this text is about _________.
A. special mixtures of gases in deep sea.
B. the problems a diver faces in deep sea.
C. air pressure under the surface of sea water.
D. a kind of illness that man suffers in the sea.
61. The text does not say so, but it makes you think that ____________.
A. deep-sea divers should be in good health.
B. divers explore the deep sea only for treasure.
C. there is a special mixture of gases under the sea.
D. diving under the water too quickly causes a kind of illness.
62. Why does a diver get the bends?
A. The air in his blood is used up.
B. His diving suit weighs too much.
C. He comes to the surface too quickly.
D. He tries to do exercise under the sea.
63. From the text we can learn that _____________.
A. man cannot stay under water for more than a few minutes.
B. the sea began to interest man in the last few years.
C. all divers will get the bends sooner or later.
D. the bends may kill a diver.

Priscilla Ouchida’s “energy-efficient” house turned out to be a horrible dream. When she and her engineer husband married a few years ago, they built a $100,000 three-bedroom home in California. Tightly sealed to prevent air leaks, the house was equipped with small double-paned (双层玻璃的) windows and several other energy-saving features. Problems began as soon as the couple moved in, however. Priscilla’s eyes burned. Her throat was constantly dry. She suffered from headaches and could hardly sleep. It was as though she had suddenly developed a strange illness.
Experts finally traced the cause of her illness. The level of formaldehyde (甲醛) gas in her kitchen was twice the maximum allowed by federal standards for chemical workers. The source of the gas? Her new kitchen cabinets and wall-to-wall carpeting.
The Ouchidas are victims of indoor air pollution, which is net given sufficient attention partly because of the nation’s drive to save energy. The problem itself isn’t new. “The indoor environment was dirty long before energy conservation came along,” says Moschandreas a pollution scientist at Geomet Technologies in Maryland. “Energy conservation has tended to accentuate the situation in some cases.”
The problem appears to be more troublesome in newly constructed homes rather than old ones. Back in the days when energy was cheap, home builders didn’t worry much about unsealed cracks. Because of such leaks, the air in an average home was replaced by fresh outdoor air about once an hour. As a result, the pollutants produced in most households seldom build up to dangerous levels.
1. It can be learned from the passage that the Ouchidas’ house __________
A. is well worth the money spent on its construction
B. is almost faultless from the point of energy conservation
C. failed to meet energy conservation standards
D. was designed and constructed in a scientific way
2. What made the Ouchidas’ new house a horrible dream?
A. Lack of fresh air.                                  B. Poor quality of building materials.
C. Gas leak in the kitchen.                          D. The newly painted walls.
3. The underlined word “accentuate” in the third paragraph most probably means ___________.
A. control        B. worsen               C. relieve               D. improve
4. This passage is most probably taken from an article entitled “_________”.
A. Energy Conservation                             B. Houses Building Crisis
C. Air Pollution Indoors                             D. Traps in Building Construction

Less than one year after France imposed(强加于)a nationwide ban on smoking in most public places, it will, from Jan. 1, 2008, extend the ban to bars, restaurants, hotels, nightclubs - and the most cherished of all: caf?s.
Ireland and Italy show that countries with longstanding smoking traditions may introduce bans fairly smoothly, as they did in 2004 and 2005. In Germany, where regulations vary locally, Berlin will join France on Jan 1. But fierce critics of the new law in France say it all but destroys the caf?'s basic function: to serve as the socioeconomic glue of society.
C?cile Perez, owner of La Fronde, a typical Parisian neighborhood caf? said: "In the morning, street cleaners in bright green uniforms sip coffee next to well-dressed businessmen; at lunch hour, working-class types rub shoulders with those of the latest fashion at the bar, while couples of all ages rub noses over salads; during the after-work rush, there is a steady soundtrack of clinking glasses combined with conversation; the constant, no matter what time of day, is the smoke that drifts through the air in curls and clouds, seemingly unnoticed."
"Our motto in France is: liberty, equality, fraternity," Olivier Seconda, a regular at the caf?, said.
"The caf? is the place that represents that. You're free to smoke, everyone pays the same price for a beer and different kinds of people talk with one another. This new law goes against that."
Seconda expects the ban to be felt even more strongly in small villages far from Paris, where the caf? is often the only means of social activity. "People already miss the space that allows people of all walks of life to share something-even if it is sometimes no more than a few words and the smoke floating between them."
69. In Germany, ______.
A. caf? smoking will be forbidden from Jan,1, 2008
B. the tradition of caf? smoking is and will be well-kept
C. local customs are well respected in terms of smoking
D. there are different regulation on smoking
70. C?cile Perez mentions the curls and clouds of smoke drifting through the air to ______
A. describe a friendly atmosphere B. show the beauty of his own caf?
C. support the ban on smoking D. remind us of something unnoticed
71. Olivier Seconda implies that ______.
A. the caf? provides people with enough liberty, equality, and fraternity
B. people, regardless of their social class, enjoy equal rights in a caf?
C. the new ban on caf? smoking should be put in effect only in villages
D. people would not find fun in a caf? without smoking a cigarette
72. The passage is written to _______.
A. show the writer's personal opinion against a new law
B. provide information for law-makers to pass a new law
C. tell why some people are unhappy about smoking ban in caf?s
D. compare attitudes to a law, held by people from different countries

–--I play high-temperature Yoga in the gym every Sunday.

---- Good habit, but the air in the gym is bad ________.

A．to be breathed

B．to breathe

C．breathing

D．being breathed

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