There is no question that the old style
of air pollution could kill people. In one week following the infamous
"peasouper" fog in December 1952,4,700 people died in London. Most of these
people were elderly and already had heart or lung diseases. A series of these
killer fogs eventually led to the British Parliament passing the Clean Air Act
which restricted the burning of coal.
Fortunately the effect of
smog on the lungs is not so dramatic. Scientists have now conducted a number of
laboratory experiments in which volunteers are exposed to ozone inside a steel
chamber for a few hours. Even at quite low concentrations there is a reversible
fall in lung function, an increase in the irritability of the lungs and evidence
of airway inflammation. Although irritable and inflamed lungs are particularly
seen in people with asthma (哮喘)
A. Low concentrations.
B. Fall in lung function.
C. Irritability of the lungs.
D. Airway inflammation.
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[单项选择] Passage Five
There is no question that the old style
of air pollution could kill people. In one week following the infamous
"peasouper" fog in December 1952,4,700 people died in London. Most of these
people were elderly and already had heart or lung diseases. A series of these
killer fogs eventually led to the British Parliament passing the Clean Air Act
which restricted the burning of coal.
Fortunately the effect of
smog on the lungs is not so dramatic. Scientists have now conducted a number of
laboratory experiments in which volunteers are exposed to ozone inside a steel
chamber for a few hours. Even at quite low concentrations there is a reversible
fall in lung function, an increase in the irritability of the lungs and evidence
of airway inflammation. Although irritable and inflamed lungs are particularly
seen in people with asthma (哮喘)
A. asthma
B. lung diseases
C. good health
D. weak health
[单项选择] Passage Five
Nanotechnology, according to its fans,
will jump-start a new industrial revolution with molecular-sized structures as
complex as the human cell and 100 times stronger than steel. The new technology
transforms everyday products and the way they are made by manipulating atoms so
that materials can be shrunk, strengthened and lightened all at once. To date
only modest nanotech-based products—such as stain-resistant fabrics and fresh
food packaging—have entered the market, but some scientists predict
nanotechnology will eventually be the only game in town. "It will be a
ubiquitous technology," said George Stephanopoulos, professor of chemical
engineering at the Massachusetts Institute of Technology. He echoes other
nanotech supporters who say industrial countries are already sliding toward its
use in every aspect of manufacturing.
A. nanotechnology can not continue in existence for a long time
B. nanotechnology will be the only activity that provides entertainment
C. nanotechnology will become the most influential in the future
D. nanotechnology will become the most beneficial thing someday
[单项选择] Passage Five
Tattoos didn’t spring up with the biker gangs and rock ’n’
roll bands. They’ve been around for a long time and had many different meanings
over the course of history.
For years, scientists believed that
Egyptians and Nubians were the first people to tattoo their bodies. Then, in
1991, a mummy was discovered, dating back to the Bronze Age of about 3,300 B.C.
"The Iceman," as the specimen was called, had several markings on his body,
including a cross on the inside of his knee and lines on his ankle and back. It
is believed these tattoos were made in a curative (治病的) effort.
Being so advanced, the Egyptians reportedly spread the practice of
tattooing throughout the world. The pyramid-building third and fourth dynasties
of Egypt developed international nations with Crete, Greece’, Persia and Arabia.
The art tattooing stretched out all the way to Southeast Asia by 2,000
B.C.
Around the same time, the Japanese became interes
A. A skill of making sculpture.
B. An art of body painting.
C. A branch of science for conserving ancient buildings.
D. A way of recording history.
[单项选择] Passage Five Sleep Sleep is one of those funny things about being a human being-you just have to do it. Have you ever wondered why And what about the crazy dreams, like the one where a bad person is chasing you and you can’t run or yell. Does that make any sense lf you have ever wondered about why people have to sleep or what causes dreams, then read on. In this article, you’ll find out all about sleep and what it does for you. Characteristics of Sleep We all know how sleep looks-when we see someone sleeping, we recognize the following characteristics: · If possible, the person will lie down to go to sleep. · The person’s eyes are closed. · The person doesn’t hear anything unless it is a loud noise. · The person breathes in a slow, rhythmic pattern. · The person’s muscles are completely relaxed. If sitting up, the person may fall out of his or her chair as sleep deepens. · A. Reptiles. B. Mammals. C. Birds. D. Fish.
[单项选择] Passage Five
As my train wasn’t due to leave for
another hour, I had plenty of time to spare. After buying some newspapers to
read on the journey, I made my way to the luggage office to collect the heavy
suitcase I had left there three days before. There were only a few people
waiting, and I took out my wallet to find the receipt for my case. The receipt
didn’t seem to be where I had left it. I emptied the contents of the wallet, and
railway-tickets, money, scraps of paper, and photographs fell out of it; but no
matter how hard I searched, the receipt was nowhere to be found.
When my turn came, I explained the situation sorrowfully to the assistant.
The man looked at me suspiciously as if to say that he had heard this type of
story many times and asked me to describe the case. I told him that it was an
old, brown-looking object, no differen
A. was leaving later than scheduled
B. was not leaving for another hour
C. was not scheduled to leave
D. was delayed for some reason
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