题目内容
（请给出正确答案）
A.more bad than it was
B.the worse than before
C.worse than ever before
D.more bad than they were
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更多“The new large passenger jets have made the traffic problems at airports ().”相关的问题
The new large passenger jets have made the traffic problems at airports ().
A.more bad than it was
B.the worse than before
C.worse than ever before
D.more bad than they were
People and air pollution are often in the same places. This means that cities with large populations have the biggest problem of dirty air. Air pollution is caused by many different things. A major kind of air pollution is the gas from cars. Statistics(统计资料) show that 93 percent of all auto trips are within cities.
Another major kind of dirty air is the burning of coal and oil for energy. This energy is needed to make electricity. Of course, much more electricity is used in the city than in the county.
On the average, we throw away more rubbish than the year before. The burning of rubbish makes air pollution even worse. Many major industries are also responsible for the dirty air in the around cities. The fumes(烟)from iron, steel, chemical, and petrol production add particles(微粒)to the air.
The effects of air pollution range from mild headaches to death. The levels of pollution found in heavy traffic may cause headaches for loss of clear vision. Wherever coal and oil are used for fuel, fumes may kill trees and plants and cause metal to corrode(腐蚀). In some of the larger cities, these fumes endanger the lives of human beings by contributing to lung diseases and causing early death.
26. The key point of the passage is that().
A. the cause of air pollution is people
B. the causes and the effects of air pollution are both found in cities
C. the effects of air pollution range from headaches to death
27. What is the purpose of this passage？
A. to persuade people to stop polluting the air().
B. to tell the causes of air pollution
C. to tell why cities are bad places to live
28. Why is air pollution more grave in the city than in the country？().
A. Because there are larger populations in cities.
B. Because the air in the city is dirty.
C. Because there are much more gas fumes from cars and burning of coal and oil for energy in the city than in the country.
29. The fumes from coal and oil may cause metal().
A. to corrode
B. to twist
C. to turn black
30. In larger cities, the fumes from coal and oil may contribute to().
A. heart disease
B. loss of clear vision
C. lung diseases
A、pyruvate carboxylase
B、fructose-1,6-bisphosphatase
C、pyruvate kinase
D、glucose-6-phosphatase
We【60】our children to school to【61】them for the time【62】they will have to work【63】themselves. Nearly everything they study at school has some【64】use in their life, but is that the only reason【65】they go to school?
There is【66】in education than just learning facts. We go to school【67】all to learn how to learn,【68】when we have【69】school, we can continue to learn. A man who really knows【70】will always be successful, because【71】he has to do something new which he has never had to do【72】, he will rapidly teach himself how to do it in the best【73】. The uneducated person,【74】, is probably unable to do something new, or does it badly. The purpose of schools, therefore, is not just to teach languages, mathematics, etc. ,【75】to teach pupils the way to learn.
(56)
A．either
B．whether
C．ever
D．as well
A．increase
B．increasing
C．had increased
D．is increasing
A．wear clothes
B．make clothes for
C．wash clothes for
D．buy clothes for
One story of the discovery of the coffee plant relates to this effect of caffeine. According to the story, coffee was discovered in East Africa. The story says that coffee was first found by a goat farmer named Kaldi. This was about the year 850.
Kaldi was leading his animals through the mountains and the goats were stopping repeatedly to eat the plants near the path. Suddenly, some of the goats started jumping up and down in a very strange way.
Kaldi figured out that the goats were acting this way because of the plants they were eating. Kaldi himself tried eating some of the green beans that the goats had been eating. He, too, felt the stimulating effect of the beans.
Kaldi wanted to prove what had happened, so he picked some of the beans and took them back to his home village, where he told his story. The green bean got the name "Kaffa" and later "coffee" because the beans were discovered in a place called Kaffa in Africa.
Then for years, people used to eat a few of the green Kaffa beans when they were in the mountains and needed extra energy or stimulation. It was later found that the coffee beans could be picked and then dried until they turned brown, and then they could be stored. If the beans were dried and stored, they could be used at any time.
Caffeine is a kind of drug that can______.
A．strengthen one's heart
B．make one's bones strong
C．make one more active or alert
D．ease the pain on the body
A．technique
B．technology
C．technical
D．technological
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