So far no life has been found on Mars, but some experts still think that there some form of life a long time ago. A. might be B. may have been C. should have been D. could be 题目和参考答案——青夏教育精英家教网—

Andrew Ritchie, inventor of the Brompton folding bicycle, once said that the perfect portable bike would be “like a magic carpet…You could fold it up and put it into your pocket or handbag”. Then he paused: “But you’ll always be limited by the size of the wheels. And so far no one has invented a folding wheel.”

It was a rare — indeed unique — occasion when I was able to put Ritchie right. A 19th-century inventor, William Henry James Grout, did in fact design a folding wheel. His bike, predictably named the Grout Portable, had a frame that split into two and a larger wheel that could be separated into four pieces. All the bits fitted into Grout’s Wonderful Bag, a leather case.

Grout’s aim: to solve the problems of carrying a bike on a train. Now doesn’t that sound familiar? Grout intended to find a way of making a bike small enough for train travel: his bike was a huge beast. And importantly, the design of early bicycles gave him an advantage: in Grout’s day, tyres were solid, which made the business of splitting a wheel into four separate parts relatively simple. You couldn’t do the same with a wheel fitted with a one-piece inflated （充气的） tyre.

So, in a 21st-century context, is the idea of the folding wheel dead? It is not. A British design engineer, Duncan Fitzsimons, has developed a wheel that can be squashed into something like a slender ellipse （椭圆）. Throughout, the tyre remains inflated.

Will the young Fitzsimons’s folding wheel make it into production? I haven’t the foggiest idea. But his inventiveness shows two things. First, people have been saying for more than a century that bike design has reached its limit, except for gradual advances. It’s as silly a concept now as it was 100 years ago: there’s plenty still to go for. Second, it is in the field of folding bikes that we are seeing the most interesting inventions. You can buy a folding bike for less than ??1,000 that can be knocked down so small that it can be carried on a plane — minus wheels, of course — as hand baggage.

Folding wheels would make all manner of things possible. Have we yet got the magic carpet of Andrew Ritchie’s imagination? No. But it’s progress.

We can infer from Paragraph 1 that the Brompton folding bike .

A. was portable

B. had a folding wheel

C. could be put in a pocket

D. looked like a magic carpet

We can learn from the text that the wheels of the Grout Portable .

A. were difficult to separate

B. could be split into 6 pieces

C. were fitted with solid tyres

D. were hard to carry on a train

We can learn from the text that Fitzsimons’s invention .

A. kept the tyre as a whole piece

B. was made into production soon

C. left little room for improvement

D. changed our views on bag design

Which of the following would be the best title for the text?

A. Three folding bike inventors

B. The making of a folding bike

C. Progress in folding bike design

D. Ways of separating a bike wheel

(09·湖南D篇)

Andrew Ritchie, inventor of the Brompton folding bicycle, once said that the perfect portable bike would be “like a magic carpet…You could fold it up and put it into your pocket or handbag”. Then he paused: “But you’ll always be limited by the size of the wheels. And so far no one has invented a folding wheel.”

It was a rare — indeed unique — occasion when I was able to put Ritchie right. A 19th-century inventor, William Henry James Grout, did in fact design a folding wheel. His bike, predictably named the Grout Portable, had a frame that split into two and a larger wheel that could be separated into four pieces. All the bits fitted into Grout’s Wonderful Bag, a leather case.

Grout’s aim: to solve the problems of carrying a bike on a train. Now doesn’t that sound familiar? Grout intended to find a way of making a bike small enough for train travel: his bike was a huge beast. And importantly, the design of early bicycles gave him an advantage: in Grout’s day, tyres were solid, which made the business of splitting a wheel into four separate parts relatively simple. You couldn’t do the same with a wheel fitted with a one-piece inflated （充气的） tyre.

So, in a 21st-century context, is the idea of the folding wheel dead? It is not. A British design engineer, Duncan Fitzsimons, has developed a wheel that can be squashed into something like a slender ellipse （椭圆）. Throughout, the tyre remains inflated.

Will the young Fitzsimons’s folding wheel make it into production? I haven’t the foggiest idea. But his inventiveness shows two things. First, people have been saying for more than a century that bike design has reached its limit, except for gradual advances. It’s as silly a concept now as it was 100 years ago: there’s plenty still to go for. Second, it is in the field of folding bikes that we are seeing the most interesting inventions. You can buy a folding bike for less than £1,000 that can be knocked down so small that it can be carried on a plane — minus wheels, of course — as hand baggage.

Folding wheels would make all manner of things possible. Have we yet got the magic carpet of Andrew Ritchie’s imagination? No. But it’s progress.

69. We can infer from Paragraph 1 that the Brompton folding bike .

A. was portable

B. had a folding wheel

C. could be put in a pocket

D. looked like a magic carpet

70. We can learn from the text that the wheels of the Grout Portable .

A. were difficult to separate

B. could be split into 6 pieces

C. were fitted with solid tyres

D. were hard to carry on a train

71. We can learn from the text that Fitzsimons’s invention .

A. kept the tyre as a whole piece

B. was made into production soon

C. left little room for improvement

D. changed our views on bag design

72. Which of the following would be the best title for the text?

A. Three folding bike inventors

B. The making of a folding bike

C. Progress in folding bike design

D. Ways of separating a bike wheel

Space is a dangerous place. not only because of meteors (流星) but also because of rays from the sun and other stars. The Atmosphere again acts as our protective blanket on earth. Light gets through, and this is essential for plants to make the food which we eat. Heat, too, makes our environment endurable. Various kinds of rays come through the air from outer space, but enormous quantities of radiation from the sun are screened off. As soon as men leave the atmosphere they are exposed to this radiation but their spacesuits or the walls of their spacecraft, if they are inside, do prevent a lot of radiation damage.

Radiation is the greatest known danger to explorers in space. The unit of radiation is called “rem”. Scientists have reason to think that a man can put up with far more radiation than 0.1 rem without being damaged; the figure of 60 rems has been agreed on. The trouble is that it is extremely difficult to be sure about radiation damage-a person may feel perfectly well, but the cells of his or her sex organs may be damaged, and this will not be discovered until the birth of deformed (畸形的) children or even grandchildren. Missions of the Apollo flights have had to cross belts of high radiation and, during the outward and return journeys, the Apollo crew accumulated a large amount of rems. So far, no dangerous amounts of radiation have been reported, but the Apollo missions have been quite short. We simply do not know yet how men are going to get on when they spend weeks and months outside the protection of the atmosphere, working in a space laboratory. Drugs might help to decrease the damage done by radiation, but no really effective ones have been found so far.

1. According to the first paragraph, the atmosphere is essential to man in that ______.

A. it protects him against the harmful rays from space

B. it provides sufficient light for plant growth

C. it supplies the heat necessary for human survival

D. it screens off the falling meteors

2. It can be inferred from the passage that ________.

A. the Apollo mission was very successful

B. protection from space radiation is no easy job

C. astronauts will have deformed children or grandchildren

D. radiation is not a threat to well-protected space explorers

3. The best title for this passage would be ________.

A. The Atmosphere and Our Environment B. Research on Radiation.

C. Effects of Space Radiation D. Importance of Protection Against Radiation

Space is a dangerous place. not only because of meteors (流星) but also because of rays from the sun and other stars. The Atmosphere again acts as our protective blanket on earth. Light gets through, and this is essential for plants to make the food which we eat. Heat, too, makes our environment endurable. Various kinds of rays come through the air from outer space, but enormous quantities of radiation from the sun are screened off. As soon as men leave the atmosphere they are exposed to this radiation but their spacesuits or the walls of their spacecraft, if they are inside, do prevent a lot of radiation damage.

Radiation is the greatest known danger to explorers in space. The unit of radiation is called “rem”. Scientists have reason to think that a man can put up with far more radiation than 0.1 rem without being damaged; the figure of 60 rems has been agreed on. The trouble is that it is extremely difficult to be sure about radiation damage-a person may feel perfectly well, but the cells of his or her sex organs may be damaged, and this will not be discovered until the birth of deformed (畸形的) children or even grandchildren. Missions of the Apollo flights have had to cross belts of high radiation and, during the outward and return journeys, the Apollo crew accumulated a large amount of rems. So far, no dangerous amounts of radiation have been reported, but the Apollo missions have been quite short. We simply do not know yet how men are going to get on when they spend weeks and months outside the protection of the atmosphere, working in a space laboratory. Drugs might help to decrease the damage done by radiation, but no really effective ones have been found so far.

1. According to the first paragraph, the atmosphere is essential to man in that ______.

A. it protects him against the harmful rays from space

B. it provides sufficient light for plant growth

C. it supplies the heat necessary for human survival

D. it screens off the falling meteors

2. It can be inferred from the passage that ________.

A. the Apollo mission was very successful

B. protection from space radiation is no easy job

C. astronauts will have deformed children or grandchildren

D. radiation is not a threat to well-protected space explorers

3. The best title for this passage would be ________.

A. The Atmosphere and Our Environment B. Research on Radiation.

C. Effects of Space Radiation D. Importance of Protection Against Radiation

Andrew Ritchie, inventor of the Brompton folding bicycle, once said that perfect portable bike would be “like a magic carpet... You could fold it up and put it into your pocket or handbag". Then he paused: “But you'll always be limited by the size of the wheels. And so far no one has invented a folding wheel."
It was a rare --- indeed unique --- occasion when I was able to put Ritchie right. A 19th-century inventor, William Henry James Grout, did in fact design a folding wheel. His bike, predictably named the Grout Portable, had a frame(框架) that split into two and a larger wheel that could be separated into four pieces. All the bits fitted into Grout's Wonderful Bag, a leather case.
Grout's aim: to solve the problems of carrying a bike on a train. Now doesn't that sound familiar? Grout intended to find a way of making a bike small enough for train travel: his bike was a huge beast. And importantly, the design of early bicycles gave him an advantage: in Grout's day, tyres were solid, which made the business of splitting a wheel into four separate parts relatively simple. You couldn't do the same with a wheel fitted with a one-piece inflated tyre.
So, in a 21st-century context, is the idea of the folding wheel dead? It is not. A British design engineer, Duncan Fitzsimons , has developed a wheel that can be squashed(挤压)into something like a slender ellipse(椭圆 ) . Throughout, the tyre remains inflated.
Will the young Fitzsimons's folding wheel make it into production? I haven’t the foggiest idea. But his inventiveness shows two things. First, people have been saying for more than a century that bike design has reached its limit, except for gradual advances. It’s as silly a concept now as it was 100 years ago: there's plenty still to go for. Second, it is in the field of folding bikes that we are seeing the most interesting inventions. You can buy a folding bike for less than £1,000 that can be knocked down so small that can be carried on a plane -- minus wheels, of course --as hand baggage.
Folding wheels would make all manner of things possible. Have we yet got the magic carpet of Andrew Ritchie's imagination? No. But it's progress.
57. We can infer form Paragraph 1 that the Brompton folding bike____.
A. was portable                            B. had a folding wheel.
C. could be put in a pocket.                  D. looked like a magic carpet
58. We can learn from the text that the wheels of the Group Portable_______.
A. were difficult to separate.                         B. could be split into 6 pieces.
C. were fitted with solid tyres.               D. were hard to carry on a train.
59. We can learn from the text that Fitzsimons`s invention_______.
A. kept the tyres as whole piece.                    B. was made into production soon.
C. left little room for improvement.                D. changed our views on bag design.
60. Which of following would be best title for the text?
A. Three folding bike inventors.                    B. The making of a folding bike
C. Progress in folding bike design                 D. Ways of separating a bike wheel

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