【单选题】The geographical position of gorillas’ residence is ______ high.

阅读材料，回答题。

High Blood Pressure

There is evidence that the usual variety of high blood pressure is，in part，a familial disease．Since families have similar genes as well as similar environment，familial diseases could be due to shared genetic influences，to shared environmental factors，or to both．For some years，the role of one environmental factor commonly shared by families，namely dietary salt，has been studied at Brook—haven National Laboratory．These studies suggest that chronic excess salt ingestion(摄取)can lead to high blood pressure in man and animals．Some individuals，however，and some rats consume large amounts of salt without developing high blood pressure．No matter how strictly all environmental factors were controlled in these experiments，some salt-fed animals never develop hypertension(高血压)whereas a few rapidly developed very severe hypertensions followed by early death．These marked variations were interpreted to result from differences in genetic constitution．

By mating in successive generations only those animals that failed to develop hypertension from salt ingestion，a resistant strain(the R strain)has been evolved in which consumPtion of large quantities of salt fails to influence the blood pressure significantly．In contrast，by mating only animals that quickly develop hypertension from salt，a sensitive strain(the S strain)has also been developed．

The availability of these two strains permits investigations not therefore possible．They provide a plausible laboratory model on which to investigate some clinical aspects of the human developing methods by which genetic susceptibility(敏感性)of human beings to high blood pressure can be defined without waiting for its appearance．

The main idea of this passage is__________． 查看材料

A.Genetic constitution，or hereditary factor is all important factor that may underlie hypertension

B.Excessive use of salt may cause high blood pressure

C.Shared environmental factors may lead to familial disease

D.There are two different kinds of strains in animals which cause their different reactions to excess salt ingestion

Most people would be【71】by the high quality of medicine【72】to most Americans. There is a lot of specialization, a great deal of【73】to the individual, a【74】amount of advanced technical equipment, and【75】effort not to make mistakes because of the financial risk which doctors and hospitals must【76】in the courts if they【77】things badly.

But the Americans are in a mess. The problem is the way in【78】health care is organized and【79】.【80】to pubic belief it is not just a free competition system. The private system has been joined by a large public system, because private care wag simply not【81】the less fortunate and the elderly.

But even with this huge public part of the system,【82】this year will eat up 84.5 billion dollars—more than 10 percent of the U. S. budget, large numbers of Americans are left【83】. These include about half the 11 million unemployed and those who fail to meet the strict limits【84】income fixed by a government trying to save where it can.

The basic problem, however, is that there is no central control【85】the health system. There is no【86】to what doctors and hospitals charge for their services, other than what the public is able to pay. The number of doctors has shot up and prices have climbed. When faced with a toothache, a sick child, or a heart attack, all the unfortunate persons concerned can do is【87】up. Two thirds of the population【88】covered by medical insurance. Doctors charge as much as they want【89】that the insurance company will pay the bill.

The rising cost of medicine in the U. S. A. is among the most worrying problems facing the country. In 198l the Country's health bill climbed 15.9 percent—about twice as fast as prices【90】general.

(41)

A．compressed

B．impressed

C．obsessed

D．repressed

There is evidence that the usual variety of high blood pressure is, in part, a familial disease. Since families have similar genes as well as similar environments, familial diseases could be due to shared genetic influences, to shared environmental factors, or to both. For some years, the role of one environmental factor commonly shared by families, namely dietary salt (i.e. sodium chloride), has been studies at Brook Haven National Laboratory. These studies suggest that frequent excess salt eating can lead to high blood pressure in man and animals. Some individuals, however, and some rats consume large amounts of salt without developing high blood pressure. No matter how strictly all environmental factors were controlled in these experiments, some salt-fed animals never developed high blood pressure whereas a few rapidly developed very serious high blood pressure followed by early death. These marked variations were interpreted to result from differences in genetic constitution.

By mating in successive generations only those animals that failed to develop high blood pressure from salt eating, a resistant strain (the "R" strain) has been evolved in which consumption of large quantities of salt falls to influence the blood pressure significantly, in contrast, by mating only animals that quickly develop high blood pressure from salt, a sensitive strain ("S" strain) has also been developed.

The availability of these two strains permits investigations not possible formerly. They provide a likely laboratory model on which to investigate some clinical(临床的) aspects of the human types of high blood pressure. More important, there might be the possibility of developing methods by which genetic likelihood of human beings to develop high blood pressure can be defined without waiting for its appearance. Radioactive(放射性的) sodium 22 was an important "tool" in working out the characteristics of the sodium chloride metabolism.

The study of the effects of salt on high blood pressure was carried out ______.

A．because members of the same family tend to used similar amounts of salt

B．to explore the long-term use of a sodium-based substance

C．because it was proven that salt caused high blood pressure

D．because of the availability of chemically pure salt

The geographical location of a country and its physical【C1】______ are very important to its development and【C2】______ . The United States is very【C3】______ in this【C4】______ .

【C5】______ , it has good【C6】______ . In almost every【C7】______ of the country it is possible to live【C8】______ during the whole year. It is true that in the south it sometimes gets very hot and in the north very cold. But the people who live in these regions become【C9】______ to the climate and never【C10】______ much when the weather is either very hot or very cold.

In a large country there is usually a great【C11】______ of different physical characteristics. In the United States, there are wide plains and high mountains, thousands of lakes and rivers of all【C12】______ , cool forests and hot deserts, and a coastline several' thousand miles long.

The many lakes and rivers,【C13】______ he long coastline, have been【C14】______ great importance to the development of the country, since they made possible the easy【C15】______ of the people and all the things people【C16】______ . Ships and boats are still necessary and important. In modem【C17】______ ,【C18】______ , trains, automobiles, trucks and airplanes are doing much of the【C19】______ which was【C20】______ done by ships and boats.

【C1】

A．location

B．character

C．characteristics

D．differences

A、growing tensions between colonies and the British colonial government

B、high debt of the colonies

C、colonial rejection on British parliament taxation

D、absence of the colonial representatives’ voice

The conclusions from the study indicate that ______ .

A．the pursuit of high self-esteem is a trend of modern living

B．what is beneficial for the country is self-control rather than self-esteem

C．it is productive to promote the traditional culture value of self-esteem

D．modesty and humility should be emphasized to avoid harmful effect of high self-esteem

Most people would be 【21】______ by the high quality of medicine 【22】______ to most Americans. There is a lot of specialization, a great deal of 【23】______ to the individual, a 【24】______ amount of advanced technical equipment, and 【25】______ effort not to make mistakes because of the financial risk which doctors and hospitals must 【26】______ in the courts if they 【27】______ things badly.

But the Americans are in a mess. The problem is the way in 【28】______ health care is organized and 【29】______ . 【30】______ to pubic belief it is not just a free competition system. The private system has been joined a large public system, because private care was simply not 【31】______ the less fortunate and the elderly.

But even with this huge public part of the system, 【32】______ this year will eat up 84.5 billion dollars—more than 10 percent of the U.S. Budget—large number of Americans are left 【33】______ . These include about half the 11 million unemployed and those who fail to meet the strict limits 【34】______ income fixed by a government trying to make savings where it can.

The basic problem, however, is that there is no central control 【35】______ the health system. There is no 【36】______ to what doctors and hospitals charge for their services, other than what the public is able to pay. The number of doctors has shot up and prices have climbed. When faced with toothache, a sick child, or a heart attack, all the unfortunate persons concerned can do is 【37】______ up. Two thirds of the population 【38】______ covered by medical insurance. Doctors charge as much as they want 【39】______ that the insurance company will pay the bill.

The rising cost of medicine in the U. S. A. is among the most worrying problems facing the country. In 1981 the country's health bill climbed 15.9 percent—about twice as fast as prices 【40】______ general.

【21】

A．compressed

B．impressed

C．obsessed

D．repressed

Most people would be 【21】______ by the high quality of medicine 【22】______ to most Americans. There is a lot of specialization, a great deal of 【23】______ to the individual, a 【24】______ amount of advanced technical equipment, and 【25】______ effort not to make mistakes because of the financial risk which doctors and hospitals must 【26】______ in the courts if they 【27】______ things badly.

But the Americans are in a mess. The problem is the way in 【28】______ health care is organized and 【29】______ . 【30】______ to public belief it is not just a free competition system. Besides the private system there has been a large public system, because private care was simply not 【31】______ the less fortunate and the elderly. But even with this huge public part of the system, 【32】______ this year will eat up 84.5 billion dollars--mom than 10 per cent of the U. S. Budget--large numbers of Americans are left 【33】______ . These include about half the 11 million unemployed and those who fail to meet the strict limits 【34】______ income fixed by a government trying to make savings wherever they can.

The basic problem, however, is that them is no central control 【35】______ the health system. There is no 【36】______ to what doctors and hospitals charge for their services, other than what the public is able to pay. The number of doctors has shot up and prices have climbed. When faced with toothache, a heart attack, or a sick child, all the unfortunate person concerned can do is 【37】______ up. Two thirds of the population 【38】______ covered by medical insurance. Doctors charge as much as they want 【39】______ that the insurance, company will pay the bill. The rising cost of medicine in the U. S. A. is among the most worrying problems facing the country. In 1981 the country's health bill climbed 15.9 per cent--about twice as fast as prices 【40】______ general.=

【21】

A．compressed

B．impressed

C．obsessed

D．repressed

Most people would be【C1】______ by the high quality of medicine【C2】______ to most Americans. There is a lot of specialization, a great deal of【C3】______ to the individual, a【C4】______ amount of advanced technical equipment, and【C5】______ effort not to make mistakes because of the financial risk which doctors and hospitals must【C6】______ in the courts if they【C7】______ things badly.

But the Americans are in a mess. The problem is the way in【C8】______ health care is organized and 【C9】______ .【C10】______ to public belief it is not just a free competition system. The private system has been joined a large public system, because private care was simply not【C11】______ the less fortunate and the elderly.

But even with this huge public part of the system,【C12】______ this year will eat up 84.5 billion dollars—more than 10 per cent of the U.S. budget—large numbers of Americans are left【C13】______ . These include about half the 11 million unemployed and those who fail to meet the strict limits【C14】______ income fixed by a government trying to make savings where it can.

The basic problem, however, is that there is no central control【C15】______ the health system. There is no【C16】______ to what doctors and hospitals charge for their services, other than what the public is able to pay. The number of doctors has shot up and prices have climbed. When faced with toothache, a sick child, or a heart attack, all the unfortunate person concerned can do is【C17】______ up.

Two-thirds of the population【C18】______ covered by medical insurance. Doctors charge as much as they want【C19】______ that the insurance company will pay the bill.

The rising cost of medicine in the U.S. is among the most worrying problems facing the country. In 1981 the country's health bill climbed 15.9 per cent—about twice as fast as prices【C20】______ general.

【C1】

A．compressed

B．impressed

C．obsessed

D．repressed

Most people would be【C1】______ by the high quality of medicine【C2】______ to most Americans. There is a lot of specialization, a great deal of【C3】______ to the individual, a【C4】______ amount of advanced technical equipment, end【C5】______ effort not to make mistakes because of the financial risk which doctors end hospitals must【C6】______ in the courts if they【C7】______ things badly.

But the Americans are in a mess. The problem is the way in【C8】______ health care is organized and【C9】______ .【C10】______ to public belief it is not just a free competition system. The private system has been joined a large public system, because private care was simply not【C11】______ the less fortunate and the elderly.

But even with this huge public part of the system,【C12】______ this year will eat up 84.5 billion dollars—ore than 10 per cent of the U.S. budget--large numbers of Americans are left【C13】______ These include about half the 11 million unemployed and those who fail to meet the strict limits【C14】______ income fixed by a government trying to make savings where it can.

The basic problem, however, is that there is no central control【C15】______ the health system. There is no【C16】______ to what doctors and hospitals charge for their services, other than what the public is able to pay. The number of doctors has shot up and prices have climbed When faced with toothache, a sick child, or a heart attack, all the unfortunate person concerned can do is【C17】______ up.

Two-thirds of the population【C18】______ covered by medical insurance. Doctors charge as much as they want【C19】______ that the insurance company will pay the bill.

The rising cost of medicine in the U.S. is among the most worrying problems facing the country. In 1981 the country's health bill climbed 15.9 per cent--about twice as fast as prices【C20】______ general.

【C1】

A．compressed

B．impressed

C．obsessed

D．repressed