题目列表(包括答案和解析)
D
With only about 1, 000 pandas left in the world, China is desperately trying to clone(克隆) the animal and save the endangered species(物种). That’s a move similar to what a Texas A & M University researchers have been undertaking for the past five years in a project called “Noah’s Ark”.
Noah’s Ark is aimed at collecting eggs, embryos(胚胎), semen and DNA of endangered animals and storing them in liquid nitrogen. If certain species should become extinct, Dr. Duane Kraemer, a professor in Texas A & M’s College of Veterinary Medicine, says there would be enough of the basic building blocks to reintroduce the species in the future.
It is estimated that as many as 2, 000 species of mammals, birds reptiles will become extinct in over 100 years. The panda, native only to China, is in danger of becoming extinct in the next 25 years.
This week, Chinese scientists said they grew an embryo by introducing cells from a dead female panda into the egg cells of a Japanese white rabbit. They are now trying to implant the embryo into a host animal.
The entire procedure could take from three to five years to complete.
“The nuclear transfer(核子移植) of one species to another is not easy, and the lack of available(capable of being used) panda eggs could be a major problem,” Kraemer believes. “They will probably have to do several hundred transfers to result in one pregnancy (having a baby). It takes a long time and it’s difficult, but this could be groundbreaking science if it works. They are certainly not putting any live pandas at risk, so it is worth the effort,” adds Kraemer, who is one of the leaders of the Project at Texas A& M, the first-ever attempt at cloning a dog.
“They are trying to do something that’s never been done, and this is very similar to our work in Noah’s Ark. We’re both trying to save animals that face extinction. I certainly appreciate their effort and there’s a lot we can learn from what they are attempting to do. It’s a research that is very much needed.”
69. According to Professor Kraemer, the major problem in cloning pandas would be the lack of _______.
A. available panda eggs B. host animals
C. qualified researchers D. enough money
70. The best title for the passage may be _______.
A. China’s Success in Pandas Cloning
B. The First Cloned Panda in the World
C. Exploring the Possibility to Clone Pandas
D. China —the Native Place of Pandas Forever
71. From the passage we know that _______.
A. Kraemer and his team have succeeded in cloning a dog
B. scientists try to implant a panda’s egg into a rabbit
C. Kraemer will work with Chinese scientists in clone researches
D. about two thousand of species will probably die out in a century
In parts of Africa, the sky is filled with a dark cloud. But this is no rain cloud. It is a living cloud made of billions of locusts that are traveling across the continent eating everything in their path.
And in the battle to stop this disaster, a radio station in Senegal, West Africa, is offering listeners 50 kilograms of rice if www..comthey can catch and kill 50 kilograms of locusts. The radio station is in one of Senegal’s worst affected regions.
This is West Africa’s biggest locust disaster in 15 years, and it is moving east, causing huge damage to crops. As they move, they breed, and increase their number and will soon threaten Sudan in the northeast of Africa. Some say it could reach Asia.
Experts say the great damage to crops in areas already suffering from food shortages and war could cause many people to go hungry. Governments in the region are not well equipped to fight the pest.
Although leaders of 12 countries have agreed on a plan, it is not expected to be enough. “We are now treating 6,000 hectares per day with pesticide, but we need to treat 20,000 hectares per day in order to have any hope of controlling this disaster,” said Mohamed Abdallahi Ould Babah, director of locust control in Mauritania.
Requests are being made for international aid, which is the only way to limit the crisis, the UN’s Food and Agriculture Organization warned.
1. The purpose of offering people rice for catching locusts in Senegal is ________.
A. to get more people to eat rice so as to leave less for locusts
B. to get more people involved in the war on the locusts
C. to prevent more people from starvation
D. to get more people to listen to the radio report on locusts
2. Which of the following is not the reason for West Africans going hungry?
A. Locust disaster causes the great damage to crops.
B. Food supply is far from the need of the people.
C. These regions are affected by the war.
D. Governments are unwilling to fight the pest.
3. It can be concluded that, in order to end the locust disaster, ________.
A. leaders of 12 countries in West Africa should call on their people to take action
B. insects experts should be sent to these regions
C. other countries outside Africa should keep close watch on their own lands
D. Help from all over the world is in urgent demand
4. What does the passage mainly talk about?
A. Food shortage in Africa. B. International aid to Africa.
C. The insects attack on Africa. D. Terrible storm in Africa.
A little under one-third of U.S. families have no Internet access and do not plan to get it, with most of the holdouts seeing little use for it in their lives, according to a survey released on Friday.
Park Associates, a Dallas-based technology market research firm, said 29 percent of U.S. families, or 31 million homes, do not have Internet access and do not intend to subscribe（预订） to an Internet service over the next 12 months. The second annual National Technology Scan conducted by Park found that the main reason why potential customers say they do not subscribe to the Internet is because of the low value to their daily lives rather than concerns over cost.
Forty-four percent of these families say they are not interested in anything on the Internet, versus just 22 percent who say they cannot afford a computer or the cost of Internet service, the survey showed. The answer "I'm not sure how to use the Internet" came from 17 percent of participants who do not subscribe. The response "I do all my e-commerce shopping and YouTube-watching at work" was cited by 14 percent of Internet-access refuseniks. Three percent said the Internet doesn't reach their homes.
The study found U.S. broadband adoption grew to 52 percent over 2006, up from 42 percent in 2005. Roughly half of new subscribers converted（转变） from slower-speed, dial-up Internet access while the other half of families had no prior access.
"The industry continues to chip （击破）away at the core of non-subscribers, but has a long way to go," said John Barrett, director of research at Parks Associates. "Entertainment applications will be the key. If anything will pull in the holdouts, it's going to be applications that make the Internet more similar to pay-TV," he predicted.
What does the underlined word “holdouts” in the first paragraph most probably mean?
A. some American families
B. those who hold out one’s opinions
C. those who have been surveyed
D. those who still haven’t access to the Internet currently
Many potential customers refuse to subscribe to the Internet mainly because __________.
A. they show too much concern about the cost
B. they can find little value of it
C. they do most YouTube-watching at work
D. the Internet doesn’t reach their homes
From the passage we can infer that _____________.
A. It is not an easy job to transform those holdouts into the Internet users
B. people will adopt dial-up Internet access no more
C. many Americans enjoy doing e-commerce shopping at home
D. more than half of the population are using the Internet in 2005
According to John Barrett, what is the key to attracting more U.S. families to broadband service?
A. making the Internet look more similar to TV set
B. applying the Internet more to entertainment
C. providing more pay-TV programs
D. chipping away at the core of non-subscribers
Which is the best title for the passage?
A. Web develops with technology
B. The present situation of web
C. Many Americans see little point to web
D. It is urgent to promote web service
A couple of years ago,before a trip to China,Nicole Davis and her US women’s volleyball teammates were warned about the prominence (显著、突出) of coach “Jenny” Lang Ping in her native country.
“I was pushed over by Chinese journalists while I was just trying to put my luggage on the bus,”said Davis.
Known as the “Iron Hammer” for her punishing spikes(扣球),Lang made it possible for China to dominate in the sport in the early 1980s.She was a key player on China’s 1984 Olympic gold medal winning team.
When the US team arrived for the Olympics,Lang,48,who is from Beijing,had to take a different route to avoid a crowd of reporters and fans.
Then came the greatest moment to Lang：While the US team was playing in a packed gym,at least 8,000 Chinese fans unfurled an American flag.
“That really says it all,” Davis said.“They look at her as an icon(偶像)．I’m sure it’s hard for them to see her coaching another country,but they love her so dearly that her success is their success.”
The loyalty of the Chinese fans was tested on Friday,when China lost a match to the US.
“It’s a pity that China lost the match,but I’m still glad that Lang Ping’s team won,since she is the pride of China’s volleyball,” said Liu Chengli,a spectator.“We also cheered for
Lang’s victory.”
Lang said she just tried to stay professional when the two teams meet.“It doesn’t matter if we play China or any other team.It’s the same.” Lang said.
Davis said she and her teammates could not have imagined the passion for volleyball among Chinese because the sport was lack of popularity in the US. The reception from Chinese fans has touched the US players,said US volleyball player Lindsey Berg.
“It’s such an honor to be here and play for our coach here in China,”she said.“The amount of support that the Chinese give to her and us has been tremendous.The whole event has been unbelievable.”
What’s the passage mainly about?
A．Staying professional. B．Cheering for the Iron Hammer.
C．A match between China and the US. D．Lang Ping’s career as a coach.
Lang Ping avoided meeting the reporters and fans probably because she ________.
A．was afraid to be questioned about her strategy
B．didn’t want to be paid much attention to
C．disliked to be with her fans
D．didn’t want to disturb public order
What does the underlined word “unfurled” exactly mean?
A．destroyed completely B．tore into pieces
C．spread out to the wind D．rolled up
What does Lang Ping mean by saying “It doesn’t matter if we play China or any other team.”？
A．American Volleyball Team will beat any team.
B．Chinese Volleyball Team is the same as other teams.
C．She just tried to stay professional.
D．The results of each match will be the same.
What impressed the US team players most?
A．The tolerance of Chinese people.
B．The popularity of volleyball in China.
C．Lang Ping’s coaching skills.
D．The loyalty for volleyball of the Chinese.
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