单选题


下面有3篇短文，每篇短文后有5道题，每道题后面有4个选项。请仔细阅读短文并根据短文回答其后面的问题，从4个选项中选择1个最佳答案。
{{B}}第一篇{{/B}}

? ?
Clone Farm

? ?Factory farming could soon enter a new era of mass production. Companies in the US are developing the technology needed to "clone" chickens on a massive scale. Once a chicken with desirable traits has been bred or genetically engineered, tens of thousands of eggs, which will hatch into identical copies, could roll off the production lines every hour. Billions of clones could be produced each year to supply chicken farms with birds that all grow at the same rate, have the same amount of meat and taste the same.
? ?This, at least, is the vision of the US’s National Institute of Science and Technology, which has given Origen Therapeutics of Burlingame, California, and Embrex of North Carolina $ 4.7 million to help fund research. The prospect has alarmed animal welfare groups, who fear it could increase the suffering of farm birds.
? ?That’s unlikely to put off the poultry industry, however, which wants disease resistant birds that grow faster on less food. "Producers would like the same meat quantity but to use reduced inputs to get there. " says Mike Fitzgerald of Origen. To meet this demand, Origen aims to "create an animal that is effectively a clone", he says. Normal cloning doesn’t work in birds because eggs can’t be removed and implanted. Instead, the company is trying to bulk-grow embryonic stem cells taken from fertilized eggs as soon as they’re laid. "The trick is to culture the cells without them starting to distinguish, so they remain pluripotent. " says Fitzgerald.
? ?Using a long-established technique, these donor cells will then be injected into the embryo of a freshly laid, fertilized recipient egg, forming a chick that is a "chimera". Strictly speaking, a chimera isn’t a clone, because it contains cells from both donor and recipient. But Fitzgerald says it will be enough if, 95 percent of a chicken’s body develops from donor cells. "In the poultry world, it doesn’t matter if it’s not 100 percent. " he says.
? ?Another challenge for Origen is to scale up production. To do this, it has teamed up with Embrex, which produces machines that can inject vaccines into up to 50,000 eggs an hour. Embrex is now trying to modify the machines to locate the embryo and inject the cells into precisely the right spot without killing it.
? ?In future, Origen imagines freezing stem cells from different strains of chicken. If orders come in for a particular strain, millions of eggs could be produced in months or even weeks. At present, maintaining all the varieties the market might call for is too expensive for breeders, and it takes years to bread enough chickens to produce the billions of eggs that farmers need.
The technology of freezing stem cells from different strains of chicken can do all the following EXCEPT that ______

A:farmers can order certain strains of chicken only. B:Origen can supply all the strains of chicken the market might need. C:chicken farmers order certain strains of chicken for economic reasons. D:chicken farmers can be supplied with whatever strain they need.

{{B}}第二篇{{/B}}

? ?
Kobe Bryant

? ?After 10 seasons wearing the No. 8 on his back, Kobe Bryant will become No. 24 next season. The reason for the surprising decision by the Los Angeles Lakers super guard last week has become a hot topic for debate.
? ?Bryant wore No. 24 when he was in early high school, but he changed to No. 33 in his senior year. He switched to No. 8 when he was selected by the Lakers in 1996, and has not been changed since.
? ?Bryant has refused to explain the decision until the end of the play-offs (季后赛). So guessing Bryant’s motive has become a popular game among NBA fans and newspaper columnists(专栏作家).
? ?There are all kinds of speculations. Many say that Bryant wants to leave the past behind and have a fresh start. He has often been criticized for playing to benefit himself and not the team as a whole. Others say that he may be trying to compare himself to Michael Jordan. Jordan was famous for his No. 23 jersey(运动衫). Some, such as NBA Sport columnist Michael Venter, argue that it is "all about money". Bryant will make more money by selling new jerseys to his fans.
? ?Some speculations are more about fun. For example, there is an opinion that Kobe is actually just a diehard(非常执著的) fan of the popular TV drama"24".
? ?All this talk has turned the number change into a major issue. It seems that there is a lot of fuss (大惊小怪) over something that should be pretty simple.
? ?Jersey numbers have their own special significance in American sports, especially basketball. Players choose their number when they join a team and they usually stick with that number for the rest of their career. When a great player retires, his team will honor him by retiring his number.
? ?To some extent, the jersey is the player, and the player is the jersey. Thus, when you see the famous No. 23 for the Chicago Bulls, you immediately think about Michael Jordan. A No. 32 Miami Heats jersey recalls the image of Shaquille O’Neal, and the Houston Rockets No. 11 belongs only to Yao Ming.
? ?Lots of stories are behind players’ jersey number selections. Jordan said that he chose No. 23 because it was roughly half of 45．Jordan’s elder brother wore the No. 45 in college. Yao Ming once revealed that the No. 11 stands for two people in love—meaning him and his girlfriend Ye Li.
Which team has Bryant played for?

A:The Los Angeles Lakers. B:The Houston Rockets. C:The Chicago Bulls. D:The Miami Heats.

{{B}}第二篇{{/B}}

? ?
Kobe Bryant

? ?After 10 seasons wearing the No. 8 on his back, Kobe Bryant will become No. 24 next season. The reason for the surprising decision by the Los Angeles Lakers super guard last week has become a hot topic for debate.
? ?Bryant wore No. 24 when he was in early high school, but he changed to No. 33 in his senior year. He switched to No. 8 when he was selected by the Lakers in 1996, and has not been changed since.
? ?Bryant has refused to explain the decision until the end of the play-offs (季后赛). So guessing Bryant’s motive has become a popular game among NBA fans and newspaper columnists(专栏作家).
? ?There are all kinds of speculations. Many say that Bryant wants to leave the past behind and have a fresh start. He has often been criticized for playing to benefit himself and not the team as a whole. Others say that he may be trying to compare himself to Michael Jordan. Jordan was famous for his No. 23 jersey(运动衫). Some, such as NBA Sport columnist Michael Venter, argue that it is "all about money". Bryant will make more money by selling new jerseys to his fans.
? ?Some speculations are more about fun. For example, there is an opinion that Kobe is actually just a diehard(非常执著的) fan of the popular TV drama"24".
? ?All this talk has turned the number change into a major issue. It seems that there is a lot of fuss (大惊小怪) over something that should be pretty simple.
? ?Jersey numbers have their own special significance in American sports, especially basketball. Players choose their number when they join a team and they usually stick with that number for the rest of their career. When a great player retires, his team will honor him by retiring his number.
? ?To some extent, the jersey is the player, and the player is the jersey. Thus, when you see the famous No. 23 for the Chicago Bulls, you immediately think about Michael Jordan. A No. 32 Miami Heats jersey recalls the image of Shaquille O’Neal, and the Houston Rockets No. 11 belongs only to Yao Ming.
? ?Lots of stories are behind players’ jersey number selections. Jordan said that he chose No. 23 because it was roughly half of 45．Jordan’s elder brother wore the No. 45 in college. Yao Ming once revealed that the No. 11 stands for two people in love—meaning him and his girlfriend Ye Li.
How long has Bryant been wearing No. 8 ?

A:Since he started to play basketball. B:For ten seasons. C:Since he entered high school. D:Since he left the Lakers.

{{B}}第二篇{{/B}}

? ?
Kobe Bryant

? ?After 10 seasons wearing the No. 8 on his back, Kobe Bryant will become No. 24 next season. The reason for the surprising decision by the Los Angeles Lakers super guard last week has become a hot topic for debate.
? ?Bryant wore No. 24 when he was in early high school, but he changed to No. 33 in his senior year. He switched to No. 8 when he was selected by the Lakers in 1996, and has not been changed since.
? ?Bryant has refused to explain the decision until the end of the play-offs (季后赛). So guessing Bryant’s motive has become a popular game among NBA fans and newspaper columnists(专栏作家).
? ?There are all kinds of speculations. Many say that Bryant wants to leave the past behind and have a fresh start. He has often been criticized for playing to benefit himself and not the team as a whole. Others say that he may be trying to compare himself to Michael Jordan. Jordan was famous for his No. 23 jersey(运动衫). Some, such as NBA Sport columnist Michael Venter, argue that it is "all about money". Bryant will make more money by selling new jerseys to his fans.
? ?Some speculations are more about fun. For example, there is an opinion that Kobe is actually just a diehard(非常执著的) fan of the popular TV drama"24".
? ?All this talk has turned the number change into a major issue. It seems that there is a lot of fuss (大惊小怪) over something that should be pretty simple.
? ?Jersey numbers have their own special significance in American sports, especially basketball. Players choose their number when they join a team and they usually stick with that number for the rest of their career. When a great player retires, his team will honor him by retiring his number.
? ?To some extent, the jersey is the player, and the player is the jersey. Thus, when you see the famous No. 23 for the Chicago Bulls, you immediately think about Michael Jordan. A No. 32 Miami Heats jersey recalls the image of Shaquille O’Neal, and the Houston Rockets No. 11 belongs only to Yao Ming.
? ?Lots of stories are behind players’ jersey number selections. Jordan said that he chose No. 23 because it was roughly half of 45．Jordan’s elder brother wore the No. 45 in college. Yao Ming once revealed that the No. 11 stands for two people in love—meaning him and his girlfriend Ye Li.
Which of the following is NOT a speculation about Bryant’s motive to change his number, according to this passage?

A:He wants to leave his past behind and have a fresh start. B:He wants to compare himself to Jordan. C:He wants to earn more money. D:He wants to show that he is a man of great importance.

{{B}}第二篇{{/B}}

? ?
Kobe Bryant

? ?After 10 seasons wearing the No. 8 on his back, Kobe Bryant will become No. 24 next season. The reason for the surprising decision by the Los Angeles Lakers super guard last week has become a hot topic for debate.
? ?Bryant wore No. 24 when he was in early high school, but he changed to No. 33 in his senior year. He switched to No. 8 when he was selected by the Lakers in 1996, and has not been changed since.
? ?Bryant has refused to explain the decision until the end of the play-offs (季后赛). So guessing Bryant’s motive has become a popular game among NBA fans and newspaper columnists(专栏作家).
? ?There are all kinds of speculations. Many say that Bryant wants to leave the past behind and have a fresh start. He has often been criticized for playing to benefit himself and not the team as a whole. Others say that he may be trying to compare himself to Michael Jordan. Jordan was famous for his No. 23 jersey(运动衫). Some, such as NBA Sport columnist Michael Venter, argue that it is "all about money". Bryant will make more money by selling new jerseys to his fans.
? ?Some speculations are more about fun. For example, there is an opinion that Kobe is actually just a diehard(非常执著的) fan of the popular TV drama"24".
? ?All this talk has turned the number change into a major issue. It seems that there is a lot of fuss (大惊小怪) over something that should be pretty simple.
? ?Jersey numbers have their own special significance in American sports, especially basketball. Players choose their number when they join a team and they usually stick with that number for the rest of their career. When a great player retires, his team will honor him by retiring his number.
? ?To some extent, the jersey is the player, and the player is the jersey. Thus, when you see the famous No. 23 for the Chicago Bulls, you immediately think about Michael Jordan. A No. 32 Miami Heats jersey recalls the image of Shaquille O’Neal, and the Houston Rockets No. 11 belongs only to Yao Ming.
? ?Lots of stories are behind players’ jersey number selections. Jordan said that he chose No. 23 because it was roughly half of 45．Jordan’s elder brother wore the No. 45 in college. Yao Ming once revealed that the No. 11 stands for two people in love—meaning him and his girlfriend Ye Li.
Why did Jordan choose No. 23?

A:Because that number would make him famous. B:Because that number would make his fans miss him. C:Because that number was related to the number his brother once wore. D:Because that number was easy to remember.

{{B}}第二篇{{/B}}

? ?
Kobe Bryant

? ?After 10 seasons wearing the No. 8 on his back, Kobe Bryant will become No. 24 next season. The reason for the surprising decision by the Los Angeles Lakers super guard last week has become a hot topic for debate.
? ?Bryant wore No. 24 when he was in early high school, but he changed to No. 33 in his senior year. He switched to No. 8 when he was selected by the Lakers in 1996, and has not been changed since.
? ?Bryant has refused to explain the decision until the end of the play-offs (季后赛). So guessing Bryant’s motive has become a popular game among NBA fans and newspaper columnists(专栏作家).
? ?There are all kinds of speculations. Many say that Bryant wants to leave the past behind and have a fresh start. He has often been criticized for playing to benefit himself and not the team as a whole. Others say that he may be trying to compare himself to Michael Jordan. Jordan was famous for his No. 23 jersey(运动衫). Some, such as NBA Sport columnist Michael Venter, argue that it is "all about money". Bryant will make more money by selling new jerseys to his fans.
? ?Some speculations are more about fun. For example, there is an opinion that Kobe is actually just a diehard(非常执著的) fan of the popular TV drama"24".
? ?All this talk has turned the number change into a major issue. It seems that there is a lot of fuss (大惊小怪) over something that should be pretty simple.
? ?Jersey numbers have their own special significance in American sports, especially basketball. Players choose their number when they join a team and they usually stick with that number for the rest of their career. When a great player retires, his team will honor him by retiring his number.
? ?To some extent, the jersey is the player, and the player is the jersey. Thus, when you see the famous No. 23 for the Chicago Bulls, you immediately think about Michael Jordan. A No. 32 Miami Heats jersey recalls the image of Shaquille O’Neal, and the Houston Rockets No. 11 belongs only to Yao Ming.
? ?Lots of stories are behind players’ jersey number selections. Jordan said that he chose No. 23 because it was roughly half of 45．Jordan’s elder brother wore the No. 45 in college. Yao Ming once revealed that the No. 11 stands for two people in love—meaning him and his girlfriend Ye Li.
What does the number Yao Ming chose stand for?

A:Two long legs. B:Two strong arms. C:Two people in love. D:Two big countries.

{{B}}第三篇{{/B}}

? ?
Renewable Energy Sources

? ?Today petroleum (石油) provides around 40% of the world’s energy needs, mostly fuelling automobiles. Coal is still used, mostly in power stations, to cover one-quarter of our energy needs, but it is the least efficient, unhealthiest and most environmentally damaging fossil fuel (矿物燃料). Natural gas reserves could fill some of the gap from oil, but reserves of that will not last into the 22nd century either. Most experts predict we will exhaust easily accessible reserves within 50 years. Less-polluting renewable energy sources offer a more practical long-term energy solution. "Renewable" refers to the fact that these resources are not used faster than they can be replaced.
? ?Hydroelectric (水力发电的) power is now the most common form of renewable energy, supplying around 20% of world electricity. China’s Three Gorges Dam is the largest ever. At five times the size of the US’s Hoover Dam, it’s 26 turbines (涡轮机) will generate the equivalent energy of 18 coal-fired power stations. It will satisfy 3% of China’s entire electricity demand.
? ?In 2003, the first commercial power station to use tidal (潮汐的) currents in the open sea opened in Norway. It is designed like windmill (风车), but others take the form of turbines.
? ?As prices fall, wind power has become the fastest growing type of electricity generation quadrupling (翻两番) worldwide between 1999 and 2005．Modern wind farms consist of turbines that generate electricity. Though it will be more expensive, there is more than enough wind to provide the world’s entire energy needs. Wind farms come in onshore and offshore forms. They can often end up at spots of natural beauty, and are often unpopular with residents. And turbines are not totally harmless—they can interfere with radar, alter climate and kill sea birds. ?Scotland is building Europe’s largest wind farm, which will power 200,000 homes. The UK’s goal is to generate one-fifth of power from renewable sources, mainly wind, by 2020．But this may cause problems, because wind is unreliable.
According to the passage, which of the following is the most polluting energy resource?

A:Petroleum B:Coal C:Natural gas D:Water

{{B}}第三篇{{/B}}

? ?
Renewable Energy Sources

? ?Today petroleum (石油) provides around 40% of the world’s energy needs, mostly fuelling automobiles. Coal is still used, mostly in power stations, to cover one-quarter of our energy needs, but it is the least efficient, unhealthiest and most environmentally damaging fossil fuel (矿物燃料). Natural gas reserves could fill some of the gap from oil, but reserves of that will not last into the 22nd century either. Most experts predict we will exhaust easily accessible reserves within 50 years. Less-polluting renewable energy sources offer a more practical long-term energy solution. "Renewable" refers to the fact that these resources are not used faster than they can be replaced.
? ?Hydroelectric (水力发电的) power is now the most common form of renewable energy, supplying around 20% of world electricity. China’s Three Gorges Dam is the largest ever. At five times the size of the US’s Hoover Dam, it’s 26 turbines (涡轮机) will generate the equivalent energy of 18 coal-fired power stations. It will satisfy 3% of China’s entire electricity demand.
? ?In 2003, the first commercial power station to use tidal (潮汐的) currents in the open sea opened in Norway. It is designed like windmill (风车), but others take the form of turbines.
? ?As prices fall, wind power has become the fastest growing type of electricity generation quadrupling (翻两番) worldwide between 1999 and 2005．Modern wind farms consist of turbines that generate electricity. Though it will be more expensive, there is more than enough wind to provide the world’s entire energy needs. Wind farms come in onshore and offshore forms. They can often end up at spots of natural beauty, and are often unpopular with residents. And turbines are not totally harmless—they can interfere with radar, alter climate and kill sea birds. ?Scotland is building Europe’s largest wind farm, which will power 200,000 homes. The UK’s goal is to generate one-fifth of power from renewable sources, mainly wind, by 2020．But this may cause problems, because wind is unreliable.
China’s Three Gorges Dam ______

A:is the first hydroelectric dam in the world. B:is of the same size as the US’s Hoover Dam. C:can generate around 3% of world electricity. D:is the largest hydroelectric dam in the world.

{{B}}第三篇{{/B}}

? ?
Renewable Energy Sources

? ?Today petroleum (石油) provides around 40% of the world’s energy needs, mostly fuelling automobiles. Coal is still used, mostly in power stations, to cover one-quarter of our energy needs, but it is the least efficient, unhealthiest and most environmentally damaging fossil fuel (矿物燃料). Natural gas reserves could fill some of the gap from oil, but reserves of that will not last into the 22nd century either. Most experts predict we will exhaust easily accessible reserves within 50 years. Less-polluting renewable energy sources offer a more practical long-term energy solution. "Renewable" refers to the fact that these resources are not used faster than they can be replaced.
? ?Hydroelectric (水力发电的) power is now the most common form of renewable energy, supplying around 20% of world electricity. China’s Three Gorges Dam is the largest ever. At five times the size of the US’s Hoover Dam, it’s 26 turbines (涡轮机) will generate the equivalent energy of 18 coal-fired power stations. It will satisfy 3% of China’s entire electricity demand.
? ?In 2003, the first commercial power station to use tidal (潮汐的) currents in the open sea opened in Norway. It is designed like windmill (风车), but others take the form of turbines.
? ?As prices fall, wind power has become the fastest growing type of electricity generation quadrupling (翻两番) worldwide between 1999 and 2005．Modern wind farms consist of turbines that generate electricity. Though it will be more expensive, there is more than enough wind to provide the world’s entire energy needs. Wind farms come in onshore and offshore forms. They can often end up at spots of natural beauty, and are often unpopular with residents. And turbines are not totally harmless—they can interfere with radar, alter climate and kill sea birds. ?Scotland is building Europe’s largest wind farm, which will power 200,000 homes. The UK’s goal is to generate one-fifth of power from renewable sources, mainly wind, by 2020．But this may cause problems, because wind is unreliable.
Which country took the lead in making use of tidal currents to produce power in 2003?

A:The UK. B:China. C:Norway. D:The US.

{{B}}第三篇{{/B}}

? ?
Renewable Energy Sources

? ?Today petroleum (石油) provides around 40% of the world’s energy needs, mostly fuelling automobiles. Coal is still used, mostly in power stations, to cover one-quarter of our energy needs, but it is the least efficient, unhealthiest and most environmentally damaging fossil fuel (矿物燃料). Natural gas reserves could fill some of the gap from oil, but reserves of that will not last into the 22nd century either. Most experts predict we will exhaust easily accessible reserves within 50 years. Less-polluting renewable energy sources offer a more practical long-term energy solution. "Renewable" refers to the fact that these resources are not used faster than they can be replaced.
? ?Hydroelectric (水力发电的) power is now the most common form of renewable energy, supplying around 20% of world electricity. China’s Three Gorges Dam is the largest ever. At five times the size of the US’s Hoover Dam, it’s 26 turbines (涡轮机) will generate the equivalent energy of 18 coal-fired power stations. It will satisfy 3% of China’s entire electricity demand.
? ?In 2003, the first commercial power station to use tidal (潮汐的) currents in the open sea opened in Norway. It is designed like windmill (风车), but others take the form of turbines.
? ?As prices fall, wind power has become the fastest growing type of electricity generation quadrupling (翻两番) worldwide between 1999 and 2005．Modern wind farms consist of turbines that generate electricity. Though it will be more expensive, there is more than enough wind to provide the world’s entire energy needs. Wind farms come in onshore and offshore forms. They can often end up at spots of natural beauty, and are often unpopular with residents. And turbines are not totally harmless—they can interfere with radar, alter climate and kill sea birds. ?Scotland is building Europe’s largest wind farm, which will power 200,000 homes. The UK’s goal is to generate one-fifth of power from renewable sources, mainly wind, by 2020．But this may cause problems, because wind is unreliable.
One of the problems with wind farms is that ______

A:there is not enough wind. B:wind is not reliable. C:they can only be built on the sea. D:they might influence the world economy.

微信扫码获取答案解析
下载APP查看答案解析

您可能感兴趣的题目