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提问人：网友cqf365 发布时间：2022-01-07
[主观题]

If you want to spark a heated debate at a dinner party, bring up the topic of genetically

modified foods. For many people, the concept of genetically altered, high-tech crop production raises all kinds of environmental, healthy, safety and ethical questions. Particularly in countries with long a grain traditions—and vocal green lobbies—the idea seems against nature.

In fact, genetically modified foods are already very much apart of out lives. A third of corn and more than half the soybeans and cotton grown in the U. S. last year were the product of biotechnology, according to the Department of Agriculture. More than 65 million a-cres of genetically modified crops will be planted in the U. S. this year. The genetic genie(妖怪) is out of the bottle.

Yet there are clearly some very real issues that need to be resolved. Like any new prod-uct entering the food chain, genetically modified foods must be subjected to rigorous testing. In wealthy countries, the debate about biotech is tempered by the fact that we have a rich array of foods to choose from and a supply that far exceeds our needs. In developing countries desperate to feed fast-growing and underfed populations, the issue is simpler and much more urgent: Do the benefits of biotech outweigh the risks？

The statistics on population growth and hunger are disturbing. Last year the world's population reached 6 billion. The U. N. estimates that nearly 800 million people around the world are undernourished. The effects are devastating. About 400 million women of child-bearing age are iron deficient, which means their babies are exposed to various birth defects. As many as 100 million children suffer from vitamin A deficiency, a leading cause of blindness.

How can biotech help？ Biotechnologists have developed genetically modified rice that is fortified with beta-carotene—which the body converts into vitamin A—and additional iron, and they are working on other kinds of nutritionally improved crops. Biotech can also improve farming productivity in places where food shortages are caused by crop damage attributable to pests, drought, poor soil and crop viruses, bacteria or fungi.

What's the passage mainly about？

A．The world's food problems.

B．The new advancement in biotech.

C．The characteristics of genetically modified foods.

D．How biotech can help solve the world's food problems.

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更多“If you want to spark a heated debate at a dinner party, bring up the topic of genetically”相关的问题
第1题
The most dynamic societies in the world are the ones that have the most entrepreneurs. The
se people are the spark in an economy’s engine, activating and stimulating economic growth. The entrepreneur looks for opportunities to make a (1)______ by satisfying unsatistied needs, to fill the gap between what consumers want and the products and services that are currently available.

A、success

B、profit

C、progress

D、promise

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第2题
听力原文： Many thousands of years ago, people lived only in hot countries. They did not li
ve in cold countries because they could not keep warm. At first men did not know how to make a fire. Sometimes lightning hit a forest and started a fire. The people took some of this fire to make a fire near their homes. A fire was very important for three reasons. It kept them warm. It frightened wild animals, because they did not attack when they saw a fire. And then another thing was discovered: if you cook food, it tastes much better!

Men still did not know how to make a fire. When they had a fire they did not let it stop burning. If it went out, they could not start it again. They had to wait for lightning to start another fire! Sometimes they had to wait for years.

Later they discovered how to make a fire. If you rub pieces of wood together, they become hot and burn. You have to rub very fast! One way of doing it is to make a little hole in a piece of wood. Pieces of wood or dry leaves are put into the hole. Then you put the end of a stick into the hole. You rub the stick between your hands. This makes it turn very quickly. The end in the hole becomes very hot. The small pieces of wood and dry leaves begin to burn.

Another way of making a fire is to knock two stones together. This makes a spark. You can use this spark to start a fire. Nowadays we have matches. We can carry them in our pockets and make a fire when we want to. We also have cigarette lighters. They are, perhaps, handier and more useful than matches. There are, of course, other advanced methods of making a fire. Many people use heaters to keep warm. Oil heaters bum oil. Gas heaters burn gas. Electric heaters use electricity. We also use oil, gas and electricity for cooking.

How was fire first made？

A．Lightning hit a forest and started a fire.

B．People rubbed two pieces of wood together to make a fire.

C．People knock two pieces of stone together to make a fire.

D．People rubbed a stick between their hands to make a fire.

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第3题
An introduction is a very important part of your presentation because it is when ___________.

A、you spark the audience’s interest in your topic

B、you summarize the major points

C、the audience has the first impression of you

D、the audience knows what your core message is

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第4题
If you aren’t curious about other cultures, then you probably haven’t had the chance to ex
perience them. The ______ and the exciting thing about intercultural communication is that everyone is operating on different 11) __________ and values. Traveling abroad is a great way to spark your curiosity about different cultures.

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第5题
I was sure that I was to be killed. I became terribly nervous. I fumbled in my pockets to
sec if there were any cigarettes, which had escaped their search. I found one and because of my shaking hands, I could barely get it to my lips. But I had no matches, they had taken those. I looked through the bars at my jailer. He did not make eye contact with me. I called out to him ,Have you got a light？" He looked at me, shrugged and came over to light my cigarette. As he came close and lit the match, his eyes inadvertently locked with mine. At that moment, I smiled. I don't know why I did that. Perhaps it was nervousness, perhaps it 'was because, when you get very close, one to another, it is very hard not to smile. In any case, I smiled. In that instant, it was as though a spark jumped across the gap between our two hearts, our two human souls. I know he didn't want to, but my smile leaped through the bars and generated a smile on his lips, too. He lit my cigarette but stayed near, looking at me directly in the eyes and continuing to smile.

I kept smiling at him, now aware of him as a person and not just a jailer. And his looking at me seemed to have a new dimension too. "Do you have kids？" he asked. "Yes, here, here." I took out my wallet and nervously fumbled for the pictures of my family. He, too, took out the pictures .of his family and began to talk about his plans and hopes for them. My eyes rifled with tears. I said that I feared that I'd never see my family again, never have the chance to see them grow up. Tears came to his eyes, too. Suddenly, without another word, he unlocked my cell and silently led me out. Out of the jail, quietly and by back routes, out of the town. There, at the edge of town, he released me. And without another word, he turned back toward the town.

My life was saved by a smile. Yes, the smile — the unaffected, unplanned, natural connection between people. I really believe that if that part of you and that part of me could recognize each other, we wouldn't be enemies. We couldn't have hate or envy or fear.

The word "fumble" in paragraph 1 means ______.

A．shake

B．search

C．hide

D．find

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第6题
Section BDirections: There are 2 passages in this section. Each passage is followed by som

Section B

Directions: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C and D. You should decide on the best choice.

Another common type of reasoning is the search for causes and results. We want to know whether cigarettes really do cause lung cancer, what causes malnutrition (营养不良), the decay of cities, or the decay of teeth. We are equally interested in effects: what is the effect of sulphur (硫)or lead in the atmosphere, of oil spills, and raw sewage in rivers and the sea, of staying up late on the night before an examination.

Causal reasoning may go from cause to effect or from effect to cause. Either way, we reason from what we know to what we want to find out. Sometimes we reason from an effect to a cause and then on to another effect. Thus, if we reason that because the lights have gone out, the refrigerator won't work, we first relate the effect (light out) to the cause (power off) and then relate that cause to another effect (refrigerator not working). This kind of reasoning is called, for short, effect to effect. It is quite common to reason through an extensive chain of causal relations. When the lights go out, we might reason in the following causal chain: lights out--power off--refrigerator not working -- temperature will rise -- milk will sour. In the other words, we diagnose a succession of effects from the power failure, each becoming the cause of the next.

Causes are classified as necessary, sufficient, or contributory. A necessary cause is one which must be present for the effect to occur as combustion (燃烧) is necessary to drive a gasoline engine. A sufficient cause is one which can produce an effect unaided, though there may be more than one sufficient cause: a dead battery is enough to keep a ear from starting, but faulty spark plugs or an empty gas tank will have the same effect. A contributory cause is one which helps to produce an effect but can't do so by itself, as running through a red light may help cause an accident, though other factors -- pedestrians or other cars in the intersection -- must also be present.

In establishing or denying a causal relation, it is usually necessary to show the process by which the supposed cause produces the effect. Such an explanation is called a causal process.

What the author discussed in the previous section is most probably about _____.

A．classification of reasoning

B．some special types of reasoning

C．relationships between causes and results

D．some other common types of reasoning

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第7题
You don't want to fight, do you？ You are yellow.
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第8题
英文翻译：我要为你抽血（）

A.I want to draw blood for you

B.I want draw blood to you

C.I want draw blood for you

D.I want to draw blood to you

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第9题
You may ______ this; I don' t want it back.

A.get

B.remain

C.maintain

D.keep

点击查看答案
第10题
Do you want a sleeping beth ticket？
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