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[单选题]

No one was able to explain the ()of the old custom.

A.beginning

B.reason

C.cause

D.origin

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更多“No one was able to explain the…”相关的问题

第1题

What will be one effect of the new biotechnology on plants？A．They will grow anywhere in th

What will be one effect of the new biotechnology on plants？

A．They will grow anywhere in the world.

B．Some will be able to grow in salty soils.

C．They will become poisonous to pests.

D．Using nitrogen from the air they will be able to cross-fertilize.

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第2题

Mr.Frederick M.Lussen was perplexed by the fact that _____.（Who Saw Murder Didn’t Cal

A.it was very extraordinary homicide

B.the killer was such a merciless one

C.the woman’s neighbors didn’t call the police

D.the killer should have tried three times before he was able to kill the woman

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第3题

Which of the following is right？A．So far, rockets with men have been to Other places.B．Roc

Which of the following is right？

A．So far, rockets with men have been to Other places.

B．Rockets with men can fly to other places farther away than the moon.

C．Perhaps one day rockets will be able to go to any place in space.

D．A plane can fly to the moon.

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第4题

Which of the following is NOT true？ ______.A．Computers perform. not only data processing f

Which of the following is NOT true？ ______.

A．Computers perform. not only data processing function in business, but also are used as tools in

B．Problem-solving and decision-making

C．In performing certain data processing tasks, computers can process information more efficiently and effectively than humans

D．A company or individual must buy a computer system in order to be able to use one

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第5题

Most people have no idea of the hard work and worry that go into the collecting of those f

ascinating birds and animals that they pay to see in the zoo. One of the questions that is always asked of me is【56】I became an animal collector in the first【57】. The answer is that I have always been interested in animals and zoos. According to my parents, the first word I was able to say with any【58】was not the conventional" mamma" or "daddy" ,【59】the word "zoo" , which I would【60】over and over again with a shrill【61】until someone, in group to【62】me up, would take me to the zoo. When I【63】a little older, we lived in Greece and I had a great【64】of pets, ranging from owls to seahorses, and I spent all my spare time【65】the countryside in search of fresh specimens to【66】to my collection of pets【67】on I went for a year to the City Zoo, as a student【68】, to get experience of the large animals, such as lions, bears, bison and ostriches,【69】were not easy to keep at home. When I left, I【70】had enough money of my own to be able to【71】my first trip and I have been going【72】ever since then. Though a collector's job is not an easy one and is full of【73】, it is certainly a job which will appeal【74】all those who love animals and【75】.

(56)

A．how

B．where

C．when

D．whether

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第6题

One of the more important communicative tasks may confront a traveler.That is the ___1

___ of when a speaker has said "no".That is, one needs to be able to recognize that a respondent has refused or ___2___ what the speaker has demanded, solicited, or offered.Equally, one needs to ___3___ the appropriate manner in which to respond in the negative when offered, solicited, or demanded something.It is ___4___ that it is sometimes difficult to recognize a refusal in one"s mother tongue where the answer might be unclear.However, in many ___5___ the meaning can be made clear.This is possible if one knows how to read the ___6___ signals.A first task for the visitor abroad is to discover which forms are used to ___7___ this function.If we compare form. and function across cultures, it soon becomes clear that one form. may be used to mean different things in another culture than in one’s own.For example, in Turkish "no" is ___8___ by moving one"s head backwards while rolling one"s eyes upwards.However, to an American this movement is ___9___ to the signal used for saying "yes".Further, in still other cultures, head shaking may have nothing to do with affirmation or negation.In parts of India, rolling the head slowly from side to side means something like "Yes, go on.I"m listening".Thus, as one goes from culture to culture, form. and function may not ___10___.If a foreigner wants to communicate appropriately, he must develop the competence of sending and receiving "no" messages.

A.acquire

B.obtain

C.fulfill

D.compare

E.match

F.denied

G.granted

H.admitted

I.signaled

J.recognition

K.conflicts

L.encounters

M.close

N.available

O.appropriate

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第7题

What is a good education？ Is it one that covers as much as possible of human history and a

chievements, past and present？ Or ode that gives graduates the ability to find employment promptly when they leave school？ Is it a broad education or a specialized one？ Should it provide students with a vast collection of facts, or merely train them to think？ Should a future engineer gain only the knowledge that will enable him to do his job properly, or would a richer background improve his professional ability as well as his personal life？ The debate goes on and on, with good arguments on both sides.

In the eighteenth and the nineteenth centuries. the question was not even worth asking. A good education was, of course, a broad one based on the humanities. An educated man knew “something about everything”. He was familiar with the great deeds and the great ideas of the past. He had read extensively；he was able to use his own language correctly and often elegantly. He could join in any conversation about plants, planets, painters, or politics. He was at ease in the world, and he knew that his education would open to him any career that he might want to try. Even if he was mostly interested in literature, he had some knowledge of the sciences and the techniques of his time。

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第8题

The making of glass is a very old industry--at least 4,500 years old. Glass has many extra

ordinary qualities and it is frequently being used in new ways.

One of the most interesting new uses for glass is in telephone communication. Scientists have developed glass fibers as thin as human hair, which are designed to can-y light signals. When the light reaches the other end, it is first changed into electrical signals, which are in turn converted into sound messages.

Called light wave communication, the new system was used successfully in an experiment in Chicago in 1997. During the experiment, two glass fibers were able to carry 672 conversations at the same time. The lightwave cable, containing 144 glass fibers, has the capacity to carry 50,000 conversations at the same time.

The lightwave communication system has two important advantages. First, the glass fiber cables are smaller and weigh less than copper. Second, they cost less.

Perhaps it can be said that telephone communication has entered the age of light.

One of the extraordinary qualities of glass is that it can carry ______.

A．sound signals

B．light signals

C．electrical signals

D．any signals

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第9题

画一条预算线，然后再画一条无差异曲线来说明与两种产品对应的满足最大化的选择。利用图回答下

述问题。

(1)假定其中一种产品实施配给。解释为什么消费者的境况可能变差。

(2)假定其中种产品被固定在当前市场价格以下的水平，因此消费者不能想买多少就买多少。你觉得消费者的境况是变好了还是变差了？

Draw a budget line and then draw an indifference curve to illustrate the satisfaction - maximizing choice associated with two products. Use your graph to answer the following questions.

a Suppose that one of the products is rationed. Explain why the consumer is likely lo be worse off.'

b. Suppose that the price of one of the products is fixed at a level below the current price. As a result, the consumer is not able to purchase as much as she would like. Can you tell if the consumer is better off or worse off？

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第10题

Economically, the world can be divided into two parts. The difference between them is that

one part in poor and the other is wealthy. In the poor countries of the world, a lot of people never get enough to eat. In the wealthy countries, a lot of people eat too much. The tragedy is that there are more people in the poor countries than there are in the wealthy countries. It is estimated that about 80% of the world's population cannot afford to have proper food, housing or medical care.

The poorer countries are often referred to as the Third World. They have special problems. Often their land is too poor to grow anything on. The land can be improved. But a lot of things have to be done first new farming methods have to be introduced, people have to be educated, and reliable sources of water and energy have to be found.

Many of these, problems are too complex for one country to solve alone. Outside help is needed, but is has to be the right kind of help. Money is not enough. Newly developed countries need to be helped to be able to help themselves.

According to the article, what is the tragedy？

A．There are more wealthy countries in the world

B．There are more poor countries in the world

C．There are more wealthy people in the wealthy countries

D．There are more poor people in the poor countries

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第11题

When I got up, it was dark.I continued to walk south.I was worried about my uncle and

cousin.Suddenly, I met a Bedouin man who was riding his camel.He took me to his house.When I had had enough rest, I asked him to take me to the road where I found a car.it took me to the city to get help.I had one day to get back to my uncle and cousin.When I got back to them, they were so happy because I had gotten help and they were able to see me again.

How did the writer finally get out of the desert？()

A、He was picked up by a car.

B、A camel took him to the road.

C、A passer-by Bedouin helped him.

D、His uncle and cousin found and rescued him.

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