Experiments under way in several labs aim to create beneficial有
益的 types of genetically遗传的 modified修正的 (GM) foods,
including starchier含淀粉的 potatoes and caffeine-free coffee beans.
Genetic engineers are even trying to transfer genes from a cold-water fish to make a frost-resistant tomato.
A low-sugar GM strawberry now in the works might one day allow people with health problems such as diabetes to enjoy the little delicious red fruits again. GM beans and grains supercharged with protein might help
1people at risk of developing kwashiorkor. Kwashiorkor, a disease caused
by severe lack of protein, is common in parts of the world where there are severe food shortages.
Commenting on GM foods, Jonathon Jones, a British researcher, said:
2“The future benefits will be enormous, and the best is yet to come.”
To some people, GM foods are no different from unmodified foods. “A tomato is a tomato,” said Brian Sansoni, an American food manufacturer.
Critics of GM foods challenge Sansoni’s opinion. They worry about
the harm that GM crops might do to people, other animals, and plants.
In a recent lab study conducted at Cornell University, scientists tested pollen made by Bt corn, which makes up one-fourth of the U.S. corn crop. The scientist sprinkled the pollen乳草属植物 onto milkweed, a plant
that makes a milky juice and is the only known food source of the monarch君主 butterfly蝴蝶 caterpillar毛虫. Within four days of munching on the
milkweed leaves, almost half of a test group of caterpillars had died.
“Monarchs are considered to be a flagship species for conservation,” said Cornell researcher Linda Raynor. “This is a warning bell.”
Some insects that are not killed by GM foods might find
3themselves make stronger. How so? The insecticides used to protect
4most of today’s crops are sprayed on the crops when needed and decay
quickly in the environment. But GM plants produce a continuous level of insecticide. Insect species feeding on those crops may develop resistance to
the plants and could do so in a hurry, say the critics. Insects may also develop a resistance to the insecticide Bt.
At the forum on GM food held last year in Canada, GM crops that have been made resistant to the herbicide might crossbreed with wild plants,
5creating “superweeds” that could take over whole fields.
So where do you stand? Should GM foods be banned禁止 in the
United States, as they are in parts of Europe? Or do their benefits 利益
outweigh 在重量(或价值等)上超过any of the risks they might carry?
1. Paragraphs 1,2&3 try to give the idea that
A. GM foods may bring about great benefits to humans.
B. We cannot recognize the benefits of GM foods too early. C. GM foods may have both benefits and harm. 伤害
D. GM foods are particularly good to the kwashiorkor patients.
2. Why is the case of the pollen传授花粉给-sprayed milkweed 乳草属植
物cited in Paragraph 6?
A；It is cited to show GM foods can kill insects effectively
B；It is cited to show GM foods contain more protein蛋白质.
C；It is cited to show GM foods also have a dark 黑暗side面.
D；It is cited to show GM foods may harm crops.
3. What happens to those insects昆虫 when not killed by the spray of
A；They may lose their ability to produce offspring.
B；They may have a higher ability能力 to adapt 使适应to the
C；They move to other fields free from insecticide.
D；They never eat again those plants containing insecticide.
4. Which of the following statements concerning关于banning GM
foods is true according to the passage?
A；Underdeveloped countries have banned GM foods.
B；Both Europe and the U.S. have banned GM foods.
C；Most European countries have not banned GM foods.
D；The United States has not banned禁止 GM foods.
5. What is the writer’s attitude to GM foods?
A；We cannot tell from the passage.
B；He thinks their benefits outweigh their risks.
C；He thinks their risks outweigh their benefits.
D；He thinks their benefits and risks are balanced.
In the digital realm, the next big advance提升; 使升级 will be voice
2声音recognition识别. The rudiments初步，入门 are already here but
in primitive原始的？早期的 form. Ask a computer to “recognize speech,”
3and it is likely to think you want it to “wreck a nice beach.” But in a
45decade or so we’ll be able to chat away and machines will soak it all in.
Microchips will be truly embedded in our lives when we can talk to them.
Not only to our computers; we’ll also be able to chat with our automobile
6navigation systems, telephone consoles, browsers, thermostats VCRs,
7microwaves and any other devices we want to boss around.
That will open the way to the next phase of the digital age: artificial
8age: artificial intelligence. By our providing so many thoughts and
preferences to our machines each day, they’ll accumulate enough information about how we think so that they’ll be able to mimic our minds
9and act as our agents. Scary, huh? But potentially quite useful. At least until they decide they don’t need us anymore and start building even smarter machines they can boss around.
10The law powering the digital age up until now has been Gordon
11Moore’s ？that microchips will double in power and halve in price every
18 months or so. Bill Gates rules because early on he acted on the assumption that computing power—the capacity of microprocessors and
memory chips—would become nearly free; his company kept churning
1213out more and more lines of complex software to make use of the cheap
14bounty. The law that will power the next few decades is that the bandwidth (the capacity of fiber-optic and other pipelines to carry digital communications) will become nearly free.
15Along with the recent advances in digital switching and storage
16technologies, this means a future in which all forms of content—movies,
music, shows, books, data, magazines, newspapers, your aunt’s recipes and home videos—will be instantly available anywhere on demand. Anyone will be able to be a producer of any content; you’ll be able to create a movie or magazine, make it available to the world and charge for it, just
17like Time Warner!
18The result will be a transition from a mass-market world to a
personalized one. Instead of centralized factories and studios that distribute or broadcast the same product to millions, technology is already allowing products to be tailored to each user. You can subscribe to news sources that
19serve up only topics and opinions that fit your fancy. Everything from shoes to steel can be customized to meet individual wishes. 练习？
1. The techniques of voice recognition
A) are mature enough for extensive use.
B) are in its initial最初的 stage 阶段或时期of development.
C) will aid people to chat through computers.
D) will assist people to recognize each other’s voice.
2. According to the second paragraph, when we reach the stage of artificial
A. machines can be our agents代理人 as they understand our thoughts.
B. Machines will give orders to smarter machines they build.
C. Machines will not need us any more.
D. Machines will be intelligent enough to boss around.
3. What’s the best description 描写of Gordon Moore’s law as mentioned
in the third paragraph?
A. It motivates 激发the development of the digital world.
B. Bill Gates rules the digital world with the law.
C. It enables computing power to become free.
D. It helps the development of the bandwidth. 带宽
4. What can people do in a future scene as described in the fourth paragraph?
A. Compose music and make it available to the world. B. Make films and charge for it.
C. Write books and sell them.
D. All of the above.
5. Which of the following statements is true of a personalized使成私人的
A. The personalized market tends to be replaced by the mass market. B.The same product is distributed to millions of users. C.In a personalized market, products are tailored制做 to each consumer.
D.Individuals can control centralized factories and studios.