题目内容
Third-generation mobile phones, known as 3G, are the next big step for the telecom industry. Data speed in 3G networks is much quicker than that in present technology. This means users can have high-speed Internet access and enjoy video and CD-quality music on their phones.
"Mobile data is not a dream; it's not an option but a requirement" said Len Lauer, head of a US communications company, Sprint PCS, at a 3G conference in Bangkok earlier this month.
With 3G, you can forget about text messages telling you yesterday's news; a 3G phone can receive video news programs, updated four times a day. Internet access will also be much quicker, making it easier to surf the Web on your phone than on your computer at home.
Don't worry about getting lost. 3G phones offer map services so you can find a new restaurant just by pressing a few keys on your handset.
However, the most impressive part of 3G technology is video calling. With live two-way video communication, you can have face-to-face talks with friends and family on your mobile phone.
Many European countries have already launched the service. In May 2000 the US Government issued five licenses to run 3G wireless services, while the first 3G phones arrived in
International telecom companies can't wait to sell 3G in
“We need to create a pool of 3G customers before the large-scale commercial launch of the service,” said Fan Yunjun, marketing manager for Beijing Mobile. “We expect that the 3G licenses will be issued late next year.”
We'll also see 3G services enter our day-to-clay lives in all-sorts of new ways, from shopping and banking to playing interactive computer games over the net. It won't be long before we think nothing of sitting on a train using a mobile palmtop to check our bank accounts or pay bills. You might even click on an icon on the screen to set up an instant video-conference with your bank clerk.
46. 3G is ________.
A. a kind of mobile phone that can send text message and make calls
B. a kind of technology that makes mobile data and video calling come true
C. a kind of player that can be used to listen to CD or MP3 music
D. a kind of system that makes it easy to surf the Internet.
47. What does Len Lauer want to inform the readers?
A. Realizing the dream of mobile data based on the application of 3G is a must.
B. There is no need to send messages since 3G can receive video news programs.
C. 3G is supposed to own all the functions that a computer has.
D. It is a choice to carry mobile data with 3G phones.
48. The 3G services can be launched after the following steps EXCEPT that ________.
A. they have to test its 3G-based technologies, networks and services
B. they need to create a group of 3G customers
C. the 3G licenses are issued and 3G phones are tested
D. international telecom companies decide to sell 3G in
49. The. last paragraph shows us that ________.
A. 3G services bring a lot of convenience to us
B. we cannot live without 3G mobile phones
C. 3G services can change our life completely
D. 3G services will take the place of other technologies
50. What is the best title of the passage?
A. Face-to-face Video Calls B. The Future of 3G
C. The New Telecom Industry--3G D. The Use of 3G Mobile Phone
46--50 BADAC
One genetic mutation(基因突变)occurs on average for every 15 cigarettes that a typical lung-cancer patient smokes, according to a study that has found for the first time all of the mutations happen during the lifetime of a cancer patient.
Scientists have completed a full genetic examinations of the genomes（基因组） of cancer patients, and hope the information will lead to a basic understanding of the causes of cancer—and possibly drugs and treatments—by making out the mutations that turn a healthy cell into a cancerous tumor cell.
They studied a lung-cancer patient who had about 23,000 DNA mutations in his lung cells that were connected with exposure(暴露) to the toxins found in cigarette smoke and had built up over his lifetime.
They also looked at a patient with malignant melanoma(恶性黑色肿瘤), the most dangerous form of skin cancer, who had got 30,000 special mutations known to be connected with exposure to sunlight.
Scientists believe this new finding into the genetics of cancer will finally lead to new drugs and perfect treatments that aim at the specific changes to the gene that cause the
disease, as well as new techniques for discovering following cancers that have escaped from treatment in other parts of the body.
“For the first time, we have a complete map of all mutations in a cancer cell,” said Dr. Peter Campbell, who led the Cancer Genome project to work out the whole DNA system of tumor cells in order find the mutations.
A similar method was performed on the cells of a patient with skin cancer, which is how the researchers were able to show that the malignant skin cells contained changes that resulted from exposure to light.
“These are the two main cancers in the developed world for which we know the chief exposure. For lung cancer it is cigarette smoke, and for malignant melanoma it is exposure to sunlight,” Professor Campbell said.
【小题1】What can the genetic examination of the genomes of cancer patients be used for?
| A．To help the professors to win the Nobel Prizes. |
| B．To advance the study of reason and cure of cancer. |
| C．To make the medicine industries earn more money. |
| D．To help the cancer patients reduce their pain. |
| A．smoke | B．sunlight | C．cell | D．poison |
| A．The lung-cancer patient had 30,000 mutations in his lung cells. |
| B．The genetics of cancer will finally lead to new drugs soon. |
| C．It’s the first time that people mapped mutations in a cancer cell. |
| D．Dr. Peter tries to invent a new drug with the DNA system. |
| A．Their smoking too much in daily life. |
| B．Their receiving too much sunshine. |
| C．Their refusing to accept treatment. |
| D．Their interest in travelling abroad. |
Gene technology to benefit people
Among all the fast growing science and technology, the research of human genes, or biological engineering as people call it, is drawing more and more attention now. Sometimes it is a hot topic discussed by people.
The greatest thing that gene technology can do is to cure serious diseases that doctors at present can almost do nothing with, such as cancer and heart disease. Every year, millions of people are murdered by these two killers. And to date, doctors have not found an effective way to cure them. But if the gene technology is applied, not only these two diseases can be cured completely, bringing happiness and more living days to the patients, but also the great amount of money people spend on curing their diseases can be saved, therefore it benefits the economy as well. In addition, human life span(寿命) can be prolonged.
Gene technology can help people to give birth to more healthy and clever children. Some families, with the English imperial(皇室) family being a good example, have hereditary(遗传的) diseases. This means their children will for sure have the family disease, which is a great trouble for these families. In the past, doctors could do nothing about hereditary diseases. But gene technology can solve this problem perfectly. The scientist just need to find the wrong gene and correct it and a healthy child will be born.
Some people are worrying that the gene research can be used to manufacture human beings in large quantities. In the past few years, scientists have succeeded in cloning a sheep; therefore these people predict that human babies would soon be cloned. But I believe cloned babies will not come out in large quantities, for most couples in the world can have babies in very normal way. Of course, the governments must take care to control gene technology.
【小题1】 What does "these two killers" in the second paragraph refer to?
| A．Gene technology and another treatment of the two diseases. |
| B．The two murderers who killed the cloned baby |
| C．The two diseases of cancer and heart disease |
| D．Hereditary diseases and cancer |
| A．How gene technology can be applied in the field of treating hereditary diseases. |
| B．Gene technology can be used to clone human babies. |
| C．Gene technology can help people to give birth of a baby. |
| D．Gene technology can help the English imperial family out |
| A．Using gene technology, people with hereditary diseases can have more living days. |
| B．Using gene technology, scientist finds the wrong gene and corrects it. |
| C．Using gene technology, human babies can be cloned. |
| D．Doctors can cure cancer and heart disease with the help of gene technology. |
| A．Expressing the writer’s idea that gene technology will benefit people |
| B．Telling people the advantages of gene technology |
| C．Telling the readers that gene technology will not benefit people |
| D．Explaining that gene technology will also do harm to the humanity |
Among all the fast growing science and technology, the research of human genes（基因）, or biological engineering as people call it, is drawing more and more attention now. Sometimes it is a hot topic discussed by people.
The greatest thing that gene technology can do is to cure serious diseases that doctors at present can almost do nothing with, such as cancer and heart disease. Every year, millions of people are murdered by these two killers. And to date, doctors have not found an effective way to cure them. But if the gene technology is applied（应用）, not only these two diseases can be cured completely, bringing happiness and more living days to the patients, but also the great amount of money people spend on curing their diseases can be saved, therefore it benefits the economy as well. In addition, human life span(寿命) can be prolonged.
Gene technology can help people to give birth to more healthy and clever children. Some families, with the English imperial family being a good example, have hereditary diseases. This means their children will for sure have the family disease, which is a great trouble for these families. In the past, doctors could do nothing about hereditary diseases. But gene technology can solve this problem perfectly. The scientists just need to find the wrong gene and correct it and a healthy child will be born.
Some people are worrying that the gene research can be used to manufacture (produce) human beings in large quantities. In the past few years, scientists have succeeded in cloning a sheep; therefore these people predict that human babies would soon be cloned. But I believe cloned babies will not come out in large quantities, for most couples in the world can have babies in very normal way. Of course, the governments must take care to control gene technology.
【小题1】What does “these two killers” in the second paragraph refer to?
| A．Gene technology and another treatment of the two diseases. |
| B．The two murderers who killed the cloned baby |
| C．The two diseases of cancer and heart disease |
| D．Hereditary diseases and cancer |
| A．How gene technology can be applied to cure family diseases. |
| B．Gene technology can be used to clone human babies. |
| C．Gene technology can help people to give birth to a baby. |
| D．Gene technology can help the English imperial family out |
| A．Expressing the writer’s idea that gene technology will benefit people |
| B．Telling people the advantages of gene technology |
| C．Telling the readers that gene technology will not benefit people |
| D．Explaining that gene technology will also do harm to the humanity |
| A．Scientists have already successfully cloned sheep. |
| B．Most couple will normally give birth to babies. |
| C．A good number of babies will be cloned |
| D．The government will take action to control it. |