题目内容
A California family drives a car that could help protect the environment. When Jon and Sandy go to the store or to their daughters’ soccer games, they drive in high-tech style. They drive a $1 million, fuel-cell-powered car. It may be the world’s most expensive car and one of the most environmentally friendly cars. The FCX is the first fuel-cell-powered car to be used by a family anywhere in the world. The FCX uses hydrogen and oxygen for fuel. Car makers have been working to develop vehicles that are better for the environment. They are developing cars that use fuel other than gasoline. And then what is fuel cell technology? Fuel cell technology works by changing the chemicals hydrogen and oxygen into water. This process produces electricity, and water vapor which comes out of the exhaust pipe. Most cars release dangerous gases such as carbon monoxide and carbon dioxide. Many scientists say these gases are major contributors to global warming. “The FCX is driven just like any other vehicle on the road, but without the gases which pollute the environment,” scientists say. Fuel cell technology has been around since the 1800s, but scientists have yet been to perfect it. They say it may take years before the technology is ready for widespread use. Another earth-friendly car is already on the market. Hybrid cars use both gasoline and an electric motor. They are becoming more popular with customers because they cut pollution and improve fuel efficiency.
46. Which of the following about the FCX is not true?
A. It may be the most expensive car in the world.
B. It is one of the most environmentally friendly cars.
C. It releases dangerous gases to pollute the air.
D. It uses hydrogen and oxygen for fuel other than gasoline.
47. According to the passage, what is the major cause for global warming?
A. Gases from FCX. B. Water vapor from cars.
C. Hydrogen and oxygen. D. Gases from cars.
48. From the passage, we know that fuel cell technology ______.
A. works by water B. has a history for over two hundred years
C. works by electricity D. has been widely used since the 1800s
49. We can infer from the passage that ______.
A. future cars will be environmentally friendly
B. there will be no gasoline for cars
C. people can’t afford to buy cars in the future
D. global warming has been stopped
50. Hybrid cars are popular because ______.
A. they are the fuel-cell-powered cars
B. they are energy-saving and cut pollution
C. they are perfect cars in the world
D. they produce no gases to pollute the environment
【小题1】C
【小题2】D
【小题3】B
【小题4】A
【小题5】B
解析
开心快乐假期作业暑假作业西安出版社系列答案
名题训练系列答案 A California family drives a car that could help protect the environment. When Jon and Sandy go to the store or to their daughters’ soccer games, they drive in high-tech style. They drive a $1 million, fuel-cell-powered car. It may be the world’s most expensive car and one of the most environmentally friendly cars. The FCX is the first fuel-cell-powered car to be used by a family anywhere in the world. The FCX uses hydrogen and oxygen for fuel. Car makers have been working to develop vehicles that are better for the environment. They are developing cars that use fuel other than gasoline. And then what is fuel cell technology? Fuel cell technology works by changing the chemicals hydrogen and oxygen into water. This process produces electricity, and water vapor which comes out of the exhaust pipe. Most cars release dangerous gases such as carbon monoxide and carbon dioxide. Many scientists say these gases are major contributors to global warming. “The FCX is driven just like any other vehicle on the road, but without the gases which pollute the environment,” scientists say. Fuel cell technology has been around since the 1800s, but scientists have yet been to perfect it. They say it may take years before the technology is ready for widespread use. Another earth-friendly car is already on the market. Hybrid cars use both gasoline and an electric motor. They are becoming more popular with customers because they cut pollution and improve fuel efficiency.
【小题1】Which of the following about the FCX is not true?
| A．It may be the most expensive car in the world. |
| B．It is one of the most environmentally friendly cars. |
| C．It releases dangerous gases to pollute the air. |
| D．It uses hydrogen and oxygen for fuel other than gasoline. |
| A．Gases from FCX. | B．Water vapor from cars. |
| C．Hydrogen and oxygen. | D．Gases from cars. |
| A．works by water | B．has a history for over two hundred years |
| C．works by electricity | D．has been widely used since the 1800s |
| A．future cars will be environmentally friendly |
| B．there will be no gasoline for cars |
| C．people can’t afford to buy cars in the future |
| D．global warming has been stopped |
| A．they are the fuel-cell-powered cars |
| B．they are energy-saving and cut pollution |
| C．they are perfect cars in the world |
| D．they produce no gases to pollute the environment |
Scientists who try to predict earthquakes have gotten some new helpers recently—animals.
That’s right, animals. Scientists have begun to understand what farmers have known for thousands of years. Animals often seem to know in advance that an earthquake is coming, and they show their fear by acting in strange ways. Before a Chinese quake in 1975, snakes awoke from their winter sleep early only to freeze to death in the cold air. Cows broke their halters (缰绳) and tried to escape. Chickens refused to enter their cage. All of this unusual behavior, as well as physical changes in the earth, warned Chinese scientists of the coming quake. They moved people away from the danger zone and saved thousands of lives.
One task for scientists today is to learn exactly which types of animal behavior predict quakes. It’s not an easy job. First of all not every animal reacts to the danger of an earthquake. Just before a California quake in 1977, for example, an Arabian horse became very nervous and tried to break out of his enclosure. The Australian horse next to him, however, remained perfectly calm. It’s also difficult at times to tell the difference between normal animal restlessness and “earthquake nerves”. A zoo keeper once called earthquake researchers to say that his cougar had been acting strangely. It turned out that the cat had an upset stomach.
A second task for scientists is to find out exactly what kind of warnings the animals receive. They know that animals sense far more of the world than humans do. Many animals can see, hear, and smell things that people do not even notice. Some can sense tiny changes in air pressure, gravity, or the magnetism of Earth. This extra sense probably helps animals predict quakes.
A good example of this occurred with a group of dogs. They were shut in an area that was being shaken by a series of tiny earthquakes. (Several small quakes often come before or after a large one.) Before each quake a low booming sound was heard. Each boom caused the dogs to bark wildly. Then the dogs began to bark during a silent period. A scientist who was recording quakes looked at his machine. It was acting as though there were a loud noise too. The scientist realized that the dogs had reacted to a booming noise. They also sensed the tiny quake that followed it. The machine recorded both, though humans felt and heard nothing.
In this case there was a machine to monitor what the dogs were sensing. Many times, however, our machines record nothing extraordinary, even though animals know a quake is coming. The animals might be sensing something we measure but do not recognize as a warning. Discovering what animals sense, and learning how they know it is a danger signal, is a job for future scientists.
1.Through the passage the writer hopes to explore __________.
|
A．why animals send a danger signal before an earthquake |
|
B．how animals know when an earthquake is coming |
|
C．why animals not men have good sense of danger |
|
D．how much animals know about an earthquake |
2. During an earthquake in China in 1975, _________.
|
A．chickens refused to go out of their cage |
|
B．snakes were frozen to death in their caves |
|
C．snakes awoke from their winter sleep earlier |
|
D．cows broke their halters and escaped from their sheds |
3.Which of the following is one of earthquake nerves according to the passage?
|
A．An Arabian horse tried to escape from his enclosure. |
|
B．A cougar had an upset stomach unexpectedly. |
|
C．An Australian horse was perfectly calm. |
|
D．A cat acted very strangely in a zoo. |
4.The scientists did an experiment with a group of dogs to _________.
|
A．find out that the machine could record unusual happenings |
|
B．compare the reactions of animals and those of humans |
|
C．prove that animals could sense more than humans |
|
D．find out what exact warnings animals sent |
A California family drives a car that could help protect the environment. When Jon and Sandy go to the store or to their daughters’ soccer games, they drive in high-tech style. They drive a $1 million, fuel-cell-powered car. It may be the world’s most expensive car and one of the most environmentally friendly cars. The FCX is the first fuel-cell-powered car to be used by a family anywhere in the world. The FCX uses hydrogen and oxygen for fuel. Car makers have been working to develop vehicles that are better for the environment. They are developing cars that use fuel other than gasoline. And then what is fuel cell technology? Fuel cell technology works by changing the chemicals hydrogen and oxygen into water. This process produces electricity, and water vapor which comes out of the exhaust pipe. Most cars release dangerous gases such as carbon monoxide and carbon dioxide. Many scientists say these gases are major contributors to global warming. “The FCX is driven just like any other vehicle on the road, but without the gases which pollute the environment,” scientists say. Fuel cell technology has been around since the 1800s, but scientists have yet been to perfect it. They say it may take years before the technology is ready for widespread use. Another earth-friendly car is already on the market. Hybrid cars use both gasoline and an electric motor. They are becoming more popular with customers because they cut pollution and improve fuel efficiency.
1.Which of the following about the FCX is not true?
|
A．It may be the most expensive car in the world. |
|
B．It is one of the most environmentally friendly cars. |
|
C．It releases dangerous gases to pollute the air. |
|
D．It uses hydrogen and oxygen for fuel other than gasoline. |
2.According to the passage, what is the major cause for global warming?
|
A．Gases from FCX. |
B．Water vapor from cars. |
|
C．Hydrogen and oxygen. |
D．Gases from cars. |
3.From the passage, we know that fuel cell technology ______.
|
A．works by water |
B．has a history for over two hundred years |
|
C．works by electricity |
D．has been widely used since the 1800s |
4.We can infer from the passage that ______.
|
A．future cars will be environmentally friendly |
|
B．there will be no gasoline for cars |
|
C．people can’t afford to buy cars in the future |
|
D．global warming has been stopped |
5.Hybrid cars are popular because ______.
|
A．they are the fuel-cell-powered cars |
|
B．they are energy-saving and cut pollution |
|
C．they are perfect cars in the world |
|
D．they produce no gases to pollute the environment |