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[主观题]

Among the two type of nuclear reaction, the mechanism of has not been understood.

提问人：网友kruzzt 发布时间：2022-01-07

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更多“Among the two type of nuclear …”相关的问题

第1题

2. In a drosophila family, there are three recessi...

2. In a drosophila family, there are three recessive mutant genes s, c and v located on X chromosome. When crossing the mutant female drosophila with wild type male, in F1 generation, all the female are wild type and all male are mutants. Using the male and female drosophila in F1 generation as parents, the results are as following: s c v 314 + + + 280 + c v 150 s + + 156 s + v 46 + c + 30 s c + 10 + + v 14 Question: (1) Please write out the genotype of two parents and F1. (2) Please decide the order of the three genes. (3) Please calculate the genetic distance among three genes, and draw the genetic map of this region. (4) What is the coefficient of coincidence？

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第2题

Select the appropriate sentences from the answer choices and match them to the type of ant

hropology that they describe. TWO of the answer choices will NOT be used. This question is worth 3 points.

Types of Anthropology

Physical Anthropology

*____________________

Cultural Anthropology

*____________________

Answer Choices

A. The focus is on the similarities and differences among cultures.

B. This field studies life on many different scales of size and time.

C. Researchers observe similarities between humans and other primates.

D. Scientists examine the fossils and skulls of early humans.

E. Researchers live and work in other societies and write ethnographies.

F. It is the study of the origins, history, and structure of the earth.

G. The story of humanity's origins is a major topic of investigation.

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第3题

听力原文：Hotels today are quite different from those of the past. People who stay in them

听力原文： Hotels today are quite different from those of the past. People who stay in them are generally traveling for business, or they are touring or on vacation. So hotels are designed mainly to meet the needs of one of these two groups of people. Hotels designed for business people are known as commercial, or transient hotels. Hotels for people on vacation are called vacation, or resort hotels.

Transient hotels are usually located in the business section of a town, while resort hotels may be at the seashore, on a mountain lake, or in the desert.

In addition to these two main types, there is a third type of hotel, called a residential hotel. This is designed to meet the needs of people who want to live in a hotel.

Inns and hotels arc located in nearly every population center in the world. In the United States alone there are a bout thirty thousand. Some hotels have as few as ten rooms, others have several hundred. Among the largest hotels in the world today are the Conrad Hilton in Chicago, Illinois, and the Russia in Moscow, each with about three thousand rooms.

(30)

A．Five.

B．Two.

C．Four.

D．Three.

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第4题

改错：It seems that every country, race, and religion observe some type of holiday or festival.

It seems that every country, race, and religion observe some type of holiday or festival. The two most celebrating holidays __1__in the North and South America, Australia and Eueope, and in the most of Christian world are Christmas and Easter. __2__Christians celebrate the birth of Christ on Christmas. The __3__exchange of gifts rises from the birthday tradition. The __4__winter holiday season is time for bright colored lights to __5__appear in and out the houses, on Christmas trees, and on __6__buildings and storefronts, At Easter, Christians celebrate the death, burial, and resurrection of Christ. This is also a time for celebration with family.A non-religious celebration in North America is Thanksgiving.Similarly, National Day and Labour Day Holidays are among the non-religious holidays in China. A common tradition is the observance of the New Year as celebrated around the world on January 1st. Therefore, various religious groups celebrate the __7__

New Year on the spring or fall. One common thread that __8__goes through all these holidays is the celebration of the __9__occasion with family, food, new clothing, lights, and festivity.They are set apart as special times to be celebrated happily with family and friends. Religious or not religious, each festival or holiday has its own legend or origin behind. __10__

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第5题

There is no doubt that adults，and even highly educated adults，vary greatly in the spee

d and efficiency of their reading. Some proceed very slowly throughout; others dash along too quickly and then have to regress. Poor readers in particular may lack the ability to vary their manner of reading according to the type of reading matter and to their intentions in reading it. A good reader can move at great speed through the text of a novel or similar light reading matter. He may be able to skim a page，picking up a word or two here and there，and gain a general idea of what the text is about without really reading it. In reading more difficult material，with the intention of taking in the whole of it，he will proceed more slowly，but even then he will vary his pace，concentrating on the key words and passages，perhaps re-reading them several times and pass more quickly over the remainder. A less efficient reader tends to maintain the same speed whatever the material he reads. Consequently，even light reading matter gives him little pleasure because he reads so slowly. But this pace may be too fast for really difficult material which requires special concentration at difficult points.A type of reading which necessitates careful attention to detail is proofreading in which the reader, in order to detect misprints in a sample print has to notice not so much the meaning of what he reads as the exact shape and order of letters and words in the text. This is extremely difficult for most people，since they are accustomed to overlooking such details. In fact，considerable practice is required to practise this task efficiently and it can be done only by reading very slowly，and by paying comparatively little attention to the general meaning of the text.

(1) The author claims that there is a difference in reading speed ___________.

A、among all the readers

B、among readers who have different experience

C、between the poorly educated and the highly educated

D、among the highly educated people

(2) A good reader is a reader who ___________.

A、concentrates on the wonderful part of the article

B、always reads slowly and carefully

C、changes his speed according to the type of reading matter

D、changes his speed according to the interesting part of the text

(3) The author says that when reading more difficult material，a good reader can read ___________

A、every part of the book

B、the most wonderful part of the book

C、the major part of the book

D、the scientific part of the book

(4) The last two sentences of the first paragraph mean that ___________.

A、reading speed too slow for a difficult book is just right for a non-serious one

B、reading speed too slow for a non-serious book may be too fast for a difficult one

C、reading speed too fast for difficult material is just right for a non-serious book is also too slow for a difficult one

D、reading speed too slow for a non-serious book is also too slow for a difficult one

(5) What is the passage mainly about？

A、Practise reading skill.

B、Difference between the highly educated and the poorly educated.

C、Reading and listening.

D、Difference in the speed and efficiency of reading.

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第6题

The most striking single fact about chimpanzees is flexibility of 【S1】______their social l

The most striking single fact about chimpanzees is flexibility of 【S1】______

their social life, the lack of any rigid form. of organization. It represents

about so far a departure from the baboon type of organization as one 【S2】______

can find among the higher primates (灵长目), and serves emphasizing 【S3】______

the great variety of primate adaptations. Chimpanzees are more huma

than baboons (狒狒), or rather they accord better by the way we like to 【S4】______

picture ourselves, as free—wheeling individuals who are tend to be 【S5】______

unpredictable, do not take readily to any form. of regimentation, and are

frequently charming. Two researches have described what they found

during more than eight months spending among chimpanzees in their 【S6】______

natural habitat, the forest: "We were quite surprised to observe what 【S7】______

there is no single distinct social unit in chimpanzee society.

Not only is there no 'family' organization; so is there a 'troop' 【S8】______

Organization—that is to say, no particular chimpanzees keep

permanently together. On the contrary, individuals move about at will,

alone or in small groups best described as bands, that sometimes form 【S9】______

into large aggregations. They leave their associates if they want to, and

oin up with new ones with conflict. 【S10】______

【S1】

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第7题

You have been badly injured in a car accident. It is necessary to give you a blood transfu

sion because you lost a great deal of blood in the accident. However, special care must be taken in selecting new blood for you. If the blood is too different from your own, the transfusion could kill you.

There are four basic types of blood: A, B, AB, and O. A simple test can indicate a person's blood type. Everybody is born with one of these four types of blood. Blood type, like hair color and height, is inherited from parents.

Because of substances contained in each type, the four groups must be transfused carefully. Basically, A and B cannot be mixed. A and B cannot receive AB, but AB may receive A or B. O can give to any other group; hence, it is often called the universal donor. For the opposite reason, AB is sometimes called the universal recipient. However, because so many reactions can occur in transfusions, patients usually receive only salt or plasma (liquid) until their blood can be matched as exactly as possible in the blood bank of a reactions to the transfusion.

There is a relationship between your blood type and your nationality. Among Europeans and people of European ancestry, about 42 percent have type A while 45 percent have type O. The rarest is type AB. Other races have different percentages. For example, some American Indian groups have nearly 100 percent type O.

An appropriate title for the passage is ______.

A．Human Blood Types.

B．Problems During the Blood Transfusion.

C．Getting Quick Treatment After an Accident

D．Blood Type and Nationality.

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第8题

Passage Four You have been badly injured in a car accident. It is necessary to give you a

Passage Four

You have been badly injured in a car accident. It is necessary to give you a blood transfusion because you lost a great deal of blood in the accident. However, special care must be taken in selecting new blood for you. If the blood is too different from your own, the transfusion could kill you.

There are four basic types of blood; A, B, AB and O. A simple test can indicate a person's blood type. Everybody is born with one of these four types of blood. Blood type, like hair color and height, is inherited from parents.

Because of substances contained in each type, the four groups must be transfused carefully. Basically, A and B cannot be mixed. A and B cannot receive AB, but AB may receive A or B. O can give to any other group, hence it is often called the universal donor. For the opposite reason, AB sometimes called the universal recipient. However, because so many reactions can occur in transfusions, patients usually receive only' salt or plasma until their blood can be matched as exactly as possible in the blood bank of a hospital. In this way, it is possible to avoid any bad reactions to the transfusion.

48. A good title for this passage is______.

A. Getting Blood and Plasma

B. Special Blood and Colors

C. Human Blood Types

D. The Blood Bank of a Hospital

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第9题

Before gold and silver were brought to Europe from file Spanish and Portuguese colonies in

Latin America during the sixteenth century, inflation had not been a major problem. Since that time, however, inflation has been a significant economic issue, especially during and after wars.

Currently, in many countries of the world, people are facing problems caused by inflation, which is a de crease in the purchasing power of money because of continuous rises in the prices of available goods. There are two different kinds of inflation, each of which can affect people's lives.

When inflation is discussed, people generally refer to an increase in prices, wages, and the amount of money circulating in a country’s economy. The most common type of inflation is called creeping inflation be cause there is a steady but manageable increase in the rate of inflation within a year. Prices rise continuously, so that workers ask for higher wages to cover the increasing costs of housing, food, and transportation. Al though such wage increases are inflationary, they are often unavoidable. As a result, a government may have to impose price and wage controls in order to control this type of inflation.

A less common type of inflation is called hyperinflation, which is usually due to war or occupation by a foreign country. During a period of hyperinflation, price levels double rapidly. Because there is too much money available in the economy, the currency decreased in value, and people lose confidence in their government's financial competence. To win back the trust of the people, the government may create a new currency.

Regardless of the type of inflation that a country's economy is experiencing, inflation affects every individual in that society. In the United States, for example, many families could no longer afford to buy at today's prices the homes that they bought years ago. As long as the costs of food and entertainment continue to rise, people will be forced to modify their lifestyles. People on fixed incomes such as pensions or scholar ships have such serious financial problems that they cannot live decently, since their incomes do not keep up with the rate of inflation.

Until there is cooperation not only among individuals within any given country but also among the various governments of the world, inflation will not continue to trouble many of us.

With what topic is the passage primarily concerned？

A．Different causes of inflation,

B．A significant economic issue--inflation.

C．The trouble caused by inflation.

D．The control of inflation.

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第10题

填空：Americans are proud of their variety and individualty, yet they love and respect

few things more than a uniform. Why are uniforms so __1__ in the United States？

Among the arguments for uniforms, one of the first is that in the eyes of most people they look more __2__ than civilian（百姓的）clothes. People have become conditioned to __3__ superior quality from a man who wears a uniform. The television repairman who wears a uniform. tends to __4__ more trust than one who appears in civilian clothes. Faith in the __5__ of a garage mechanic is increased by a uniform. What an easier way is there for a nurse, a policeman, a barber, or a waiter to __6__ professional identity（身份）than to step out of uniform？ Uniforms also have many __7__ benefits. They save on other clothes. They save on laundry bills. They are often more comfortable and more durable than civilian clothes.

Primary among the arguments against uniforms is their lack of variety and the consequent loss of __8__ experienced by people who must wear them. Though there are many types of uniforms,

the wearer of any particular type is generally stuck with it, without __9__, until retirement. When people look alike, they tend to think, speak, and act __10__, on the job at least.

[A]skill

[B]popular

[C]get

[D]change

[E]similarly

[F]professional

[G]character

[H]individuality

[I]inspire

[J]differently

[K]expect

[L]practical