题目内容
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Under what conditions will the formation of cancer begin？ ()
A．When a chromosome breaks apart near an oncogene and its control functions fail.
B．When people drink too much and are easy to get tired.
C．When people smoke too much and are difficult to get to sleep.
D．When people eat too much petroleum-based products.
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更多“Under what conditions will the…”相关的问题
Under stress, people's blood pressure goes up, _________their race or sex.
A． whichever
B． no matter how
C． whether
D． no matter what
What' s the population of the USA according to the text？
A．7 000 000.
B．14000 000.
C．Twice of the young persons under twenty-five.
D．Not mentioned.
What should you do if your child is under six years old？
A．You should let him take two tablets a day
B．You should reduce the dosage anyway.
C．You should find the directions on the bottle.
D．You should ask the doctor for advice.
According to Paragraph l，the man who does more than is required__________ ．
A.is ready to accept what the society offers him
B.expects nothing in retum for his work
C.feels that he iS under heavy debt
D.thinks this makes his life easy
根据以下内容回答题：
A volcanic eruption in Iceland has sent ash across northern Europe．Airlines have stopped or changed the flights across the Atlantic Ocean，leaving hundreds of passengers stuck in air-ports．
Grimsvoto is oDe of the largest and most active volcanoes in Europe．What makes Grimsvoto different is that it lies under a huge glacier(冰川)of ice up to 12 meters thick．The hot volcano heats up the ice above it，which then forms a layer of water between the glacier and the volcano．This layer of water puts pressure on the volcano，keeping it stable．As the water flows out from under the glacier，the pressure lifts．The lava(岩浆)from the volcano then comes up to the surface．This is exactly what happened today．
Now．airlines have to make changes to their flights SO as not to fly through the clouds of volcanic as．h．According to．KLM，one of Europe’s biggest airlines，airplanes cannot go under the cloud or over it．Going through the cloud can result in ash getting stuck in the airplane’s engines，causing damage to the plane．
The eruption has also caused problems for animals in Iceland．The volcano left ash and sharp，glass-like rocks all over the countryside．Farmers are keeping their animals inside to stop them from eating ash—covered grass or the sharp objects．
What makes Grimsvoto different from other volcanoes？ 查看材料
A.It is below-ice．
B.It lies under the sea．
C.It is the largest volcano．
D.Its lava affects the airlines．
The next morning Mrs. Brown telephoned to say, "Doctor, it's very nice of you. I had the first【36】night's sleep last night in two months.【37】in those pills？"
The doctor said," It's an old formula(方子) I【38】for years, Just【39】taking them for a week. "Turning to his nurse, he said, "It's【40】what a little soda(苏打片)can do."
(56)
A．parent
B．doctor
C．friend
D．teacher
Last summer I found, in the rock garden, a tiny little plant that I could not immediatelyrecognize. I knew I didn&39; t plant it and Denise said she didn&39; t either. We decided to let it continuegrowing until we could find out what it was.
Weeks passed and as I made my way back to the strange plant, it appeared to&39;be a sunflower. Itlooked thin and tall with only one head on it. I decided to baby it along and weed(除草) around it.As I pulled rocks from the area to get to the weeds, I noticed something unusual. The sunflower hadnot started where I saw it begin. It actually had begun under a big rock and grown under and around it to reach the sun.
If a tiny little sunflower didn&39; t let a big rock stand in its way of developing, we too have theability to do the same thing. If we believe in ourselves like that little sunflower, we can reach wherewe aim to go and get what we need for growth.
We need to believe in ourselves knowing we have the ability to achieve our goals. Like thesunflower, it knew it had the ability to get over the rocks because it had faith in itself that it wouldsucceed. Stand tall like the sunflower and be proud of who and what we are,then other things will beginto support us. We will find a way to go under or around any "rocks" in order to realize our goals.
Why did the family plant flowers in the "rock garden"？
A.To attract visitors.
B.To remove the rocks.
C.To please their neighbors.
D.To make the area colorful.
The author let the tiny plant continue growingA.to see how long it could live
B.to see how big it could grow
C.to find out what it actually was
D.to know if his wife had planted it
Why did the author think the sunflower was unusual？A.It was very thin and tall.
B.It had only one head on it.
C.It grew on top of a big rock.
D.It began to grow under a rock.
What does the author want to say through the story？A.Rocks cannot prevent us from success.
B.Sunflowers are able to grow everywhere.
C.We should take good care of the rock gardens.
D.We can get over difficulties if we trust ourselves.
请帮忙给出每个问题的正确答案和分析，谢谢！
Today there are about seven million Americans in the colleges and universities. Young persons under twenty-five make up nearly half of the American population. Many of these will soon be in charge of the nation. Naturally, their ideas are important to everyone in the country, and it is necessary for older people to understand what they think and feel.
College students today have strong opinions about right and wrong. They are deeply interested in making a better life for all people, especially for those who have not been given a fair chance before now. They see much that is wrong in the lives of their parents. It is hard for them to see what is right and good in the older ways. As a result, there is often trouble in American families.
Which of the following statements is true？
A．People haven' t written much about American youth.
B．Writers have wasted a great deal of their effort to write about American youth.
C．Much has been written about American youth.
D．Young people' s ideas are not important enough to the USA.
Not only did the Indians appear to lack a formal system of authority, but they also deeply hated any efforts to control their actions. All members of the tribes knew what was required of them by lifelong familiarity with the tasks of the area. These tasks tended to be simple, since the Indian's rate of social change was slow. Thus, although subgroups such as soldiers had recognized leaders, no real authority was required. Rather than giving direct orders (which were considered rough), members of the tribes would arouse others to action by examples.
It would be difficult, if not impossible, to carry out such a system in our own society. Most of us have grown up under one authority or another for as long as we can remember. Our parents, our teachers, our bosses, our government all have the recognized right under certain conditions to tell us what to do. The authority is so much a part of our culture that it is hard for us to imagine a workable society without it. We have been used to relying on authority to get things done and would probably be uncomfortable with the Indian methods of examples on a large scale.
Of course, the major reason why the Indian system would not be suitable for us is that our society is too large. The number of tasks that various members of our society have to perform. often under tight time and resource limitations could not be treated by the Indian system. In modern societies, the formal authority system is necessary to achieve any social objectives.
Which of the following statements is correct according to the passage？
A．From 1710 to 1780, European soldiers came across some Indian groups in the western Great Lakes.
B．European soldiers were quite friendly to the Indian groups.
C．The Indian groups had no leaders.
D．The Indian groups were friendly to each other without a formal leadership system.
Not long age, experiments showed that birds rely on the sun to guide them during daylight hours. But what about birds that fly by night？ Tests with artificial stars have proved that certain night - flying birds are able to follow the stars in their long - distance flights.
A dove (鸽子) had spent its lifetime in a cage and had never flown under a natural sky. Yet it showed an inborn ability to use the stars for guidance. The bird's cage was placed under an artificial star - filled sky. (76) The bird tried to fly in the same direction as that taken by his outdoor cousins. Any change in the position of the artificial stars caused a change in the direction of his flight.
(77) But the stars are apparently their principal means of navigation (航行) only. When the stars are hidden by clouds, they seemingly find their way by such landmarks as mountain ranges, coast lines, and river courses. But when it's too dark to see these, the doves circle helplessly, unable to find their way.
The reason why birds don't get lost on long flights ______.
A．have been known to scientists for many years
B．have only recently been discovered
C．are known by us
D．will probably remain a mystery
Passage Three
Questions 31 to 35 are based on the following passage.
What are the specific traits that will assist executives to climb the ladder of success？ Opinions vary widely. Given approximately equal qualifications and circumstances，some claim the success factor is largely a matter of luck-being in the right place at the right time. Others speak of an almost crazy devotion to work，combined with a degree of ruthlessness. One “expert” maintains that it's undoubtedly a matter of how much education your mother had.
To make it big，executives must possess four basic skills：
First，drive. Business success takes an unusual amount of energy. A successful executive-almost by definition-is a striver. He will get tense when he is not striving.
Second，people sense. Some say being able to judge people is more important than a high IQ. The skill can be instinctual(本能的)，but in most cases it is painstakingly learned.
Third，communications ability. Different executives make themselves understood in different ways. Some transmit ideas best face to face；others are masters of the telephone call；still others are persuasive writers. One way or another，they all communicate clearly.
Fourth，calm under pressure. No businessman will get very far if he chokes up.
Some people claim that besides hard work，the success also requires______.
A. equal qualifications
B. specific traits
C. much education
D. a degree of cruelty
