单选题According to the passage, the scientists carried out their researches on ______.A smokers from different parts of the worldB smokers from different states in the United StatesC actors and actresses who smoke a lotD wait staff and bartenders

题目

单选题

According to the passage, the scientists carried out their researches on ______.

smokers from different parts of the world

smokers from different states in the United States

actors and actresses who smoke a lot

wait staff and bartenders

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相似问题和答案

第1题：

There are many stereotypes about the character of people in various parts of the United States．In the Northeast and Midwest,people are said to be closed and private．In the South and West,however,they are often thought of as being more open and hospitable．Ask someone from St．Louis where the nearest sandwich shop is,and he or she will politely give you directions．A New Yorker might eye you at first and after deciding it is safe to talk to you,might give you a rather unexpected explanation．A person from Georgia might be very kind about directing you and even suggest some different places to eat．A Texan just might take you to the place and treat you to lunch.
American stereotypes are abundant．New Englanders are often thought of as being friendly and helpful．Southerners are known for their hospitality and warmth．People from the western part of the United States are often considered very outgoing．These differences in character can be traced to different factors such as climate,living conditions,and historical development.
When travelling from place to place,Americans themselves are often surprised at the differing degrees of friendliness in the United States.

New Englanders are often thought of as being__.

A.hospital and warm
B.out going
C.friendly and helpful
D.all of the above

答案：C

解析：

参见第二段中句子“New Englanders are often thought of as being friendly and helpful．”

第2题：

A.even Americans are surprised at the big differences among themselves
B.there are many differences in character in different parts of the USA
C.there are many reason for the differences
D.stereotypes about people are not necessarily true

答案：B

解析：

第一个句子中写道“many stereotypes”，即可知应选B项。

第3题：

The ( )_ of invitation vary in different parts of the United States.

A.consume

B.consult

C.customs

D.cultural

答案：C

第4题：

Questions 21 to 25 are based on the following passage. Lead deposits, which accumulated in soil and snow during the 1960’s and 70’s, were primarily the result of leaded gasoline emissions originating in the United States. In the twenty years that the Clean Air Act has mandated unleaded gas use in the United States, the lead accumulation worldwide has decreased significantly. A study published recently in the journal Nature shows that air-borne leaded gas emissions from the United States were the leading contributor to the high concentration of lead in the snow in Greenland. The new study is a result of the continued research led by Dr. Charles Boutron, an expert on the impact of heavy metals on the environment at the National Center for Scientific Research in France. A study by Dr. Boutron published in 1991 showed that lead levels in arctic (北极的) snow were declining. In his new study, Dr. Boutron found the ratios of the different forms of lead in the leaded gasoline used in the United States were different from the ratios of European, Asian and Canadian gasolines and thus enabled scientists to differentiate (区分) the lead sources. The dominant lead ratio found in Greenland snow matched that found in gasoline from the United States. In a study published in the journal Ambio, scientists found that lead levels in soil in the Northeastern United States had decreased markedly since the introduction of unleaded gasoline. Many scientists had believed that the lead would stay in soil and snow for a longer period. The authors of the Ambio study examined samples of the upper layers of soil taken from the same sites of 30 forest floors in New England, New York and Pennsylvania in 1980 and in 1990. The forest environment processed and redistributed the lead faster than the scientists had expected. Scientists say both studies demonstrate that certain parts of the ecosystem (生态系统) respond rapidly to reductions in atmospheric pollution, but that these findings should not be used as a license to pollute. It can be inferred from the last paragraph that scientists （）

A、are puzzled by the mystery of forest pollution
B、feel relieved by the use of unleaded gasoline
C、still consider lead pollution a problem
D、lack sufficient means to combat lead pollution

正确答案:C

第5题：

根据以下材料，回答题
People have smoked cigarettes for a longtime now. The tobacco which is used to make cigarettes was first grown in whatis now part of the United States. Christopher Columbus, who discovered America,saw the Indians smoking. Soon the dried leaves were transported to Europe. In thelate 1800s, the Turks made cigarettes popular.
Cigarette smoke contains at least twoharmful substances, tar and nicotine. Tar, which forms as the tobacco burns,damages the lungs and therefore affects breathing. Nicotine, which is found inthe leaves, causes the heart to beat faster and increases the breathing rate.Nicotine in large can kill a person by stopping a person′s breathing muscles.Smokers usually take in small amounts that the body can quickly break down.
Nicotine can make new smokers feel dizzy (头晕) or sick to theirstomachs. The heart rate for young smokers increases 2 to 3 beats per minute.Nicotine also lowers skin temperature and reduces blood flow in the legs andfeet. It plays an important role in increasing smokers′ risk of heart disease andstroke.
Smoking cigarettes is dangerous. Cigarettesmoking was the cause of lung cancer and several other deadly diseases.

What′s the main idea of this passage 查看材料

A.Where did cigarettes come from
B.The effect of smoking on your body.
C.How to smoke is healthy
D.Who is the first smoker

答案：B

解析：

主旨题。通读全文可知本文主要介绍的是吸烟的影响。

第6题：

A.the weather
B.the history
C.geography
D.the names

答案：D

解析：

参见第二段最后一句。

第7题：

A.New Yorkers are usually open with stranger
B.People from the South are usually considered good host
C.The friendliest Americans travel from place to plac
D.Different parts have different customs and habit

答案：B

解析：

第一段中是美国不同地区人物性格的对比，不难看出，本题中只有B项是真实的。

第8题：

From the passage we can know that I different cultures, different numbers have different meanings.()

此题为判断题(对，错)。

正确答案：正确

第9题：

共用题干
The Dangers of Secondhand Smoke

Most people know that cigarette smoking is harmful to their health.Scientific research shows that it
causes many kinds of diseases.In fact,many people who smoke get lung cancer. However,Edward Gilson
has lung cancer,and he has never smoked cigarettes.He lives with his wife Evelyn,who has smoked about
a pack of cigarettes a day throughout their marriage.________(46)
No one knows for sure why Mr. Gilson has lung cancer. Nevertheless,doctors believe that secondhand
smoke may cause lung cancer in people who do not smoke because nonsmokers often breathe in the smoke
from other people's cigarettes.________(47)The US Environmental Protection Agency reports that about
53,000 people die in the United States each year as a result of exposure to secondhand smoke.
The smoke that comes from a lit cigarette contains many different poisonous chemicals.In the past,
scientists did not think that these chemicals could harm a nonsmoker's health._________(48)They
discovered that even nonsmokers had unhealthy amounts of these toxic chemicals in their bodies.As a matter
of fact,almost all of us breathe tobacco smoke at times,whether we realize it or not. For example,we can
not avoid secondhand smoke in restaurants,hotels and other public places.Even though many public places
have nonsmoking areas,smoke flows in from the areas where smoking is permitted.
It is even harder for children to avoid secondhand smoke._________(49)Research shows that chil-
dren who are exposed to secondhand smoke are sick more often than children who live in homes where no one
smokes and that the children of smokers are more than twice as likely to develop lung cancer when they are
adults as are children of nonsmokers.The risk is even higher for children who live in homes where both
parents smoke.
People are becoming very aware of the dangers of secondhand smoke._________（50)

__________（50）
A:Recently,though,scientists changed their opinion after they studied a large group of nonsmokers.
B:The Gilsons have been married for 35 years.
C:This smoke is called secondhand smoke.
D:However,secondhand smoke is dangerous to all people,old or young.
E:As a result,they have passed laws which prohibit people from smoking in many public places.
F: In the United States,nine million children under the age of five live in homes with at least one smoker.

答案：E

解析：

前一句主要讲的是，Gilson先生与妻子Evelyn生活在一起，而Evelyn自他们结婚以来一直是每天差不多抽一包烟。接下来显然应选表示他们结婚年限的句子。再者，只有B项提到了Gilsons。
前一句提到，不吸烟者时常吸人吸烟者吸烟时呼出的烟，后面应跟这种烟的定义，故选C。
前一句讲的是过去科学家们对二手烟的看法，接下来的句子应表示他们改变了看法，因为后面的句子表明他们所持的观点已与过去截然不同。
前一句提到儿童与二手烟，接下来的句子自然仍然与儿童有关。
前一句讲的是人们逐渐意识到二手烟的危害，因此接下来的句子应表示人们采取措施，禁止在公共场所吸烟。第6部分：完形填空

第10题：

Questions 21 to 25 are based on the following passage. Lead deposits, which accumulated in soil and snow during the 1960’s and 70’s, were primarily the result of leaded gasoline emissions originating in the United States. In the twenty years that the Clean Air Act has mandated unleaded gas use in the United States, the lead accumulation worldwide has decreased significantly. A study published recently in the journal Nature shows that air-borne leaded gas emissions from the United States were the leading contributor to the high concentration of lead in the snow in Greenland. The new study is a result of the continued research led by Dr. Charles Boutron, an expert on the impact of heavy metals on the environment at the National Center for Scientific Research in France. A study by Dr. Boutron published in 1991 showed that lead levels in arctic (北极的) snow were declining. In his new study, Dr. Boutron found the ratios of the different forms of lead in the leaded gasoline used in the United States were different from the ratios of European, Asian and Canadian gasolines and thus enabled scientists to differentiate (区分) the lead sources. The dominant lead ratio found in Greenland snow matched that found in gasoline from the United States. In a study published in the journal Ambio, scientists found that lead levels in soil in the Northeastern United States had decreased markedly since the introduction of unleaded gasoline. Many scientists had believed that the lead would stay in soil and snow for a longer period. The authors of the Ambio study examined samples of the upper layers of soil taken from the same sites of 30 forest floors in New England, New York and Pennsylvania in 1980 and in 1990. The forest environment processed and redistributed the lead faster than the scientists had expected. Scientists say both studies demonstrate that certain parts of the ecosystem (生态系统) respond rapidly to reductions in atmospheric pollution, but that these findings should not be used as a license to pollute. The study published in the journal Nature indicates that （）

A、the Clean Air Act has not produced the desired results
B、lead deposits in arctic snow are on the increase
C、lead will stay in soil and snow longer than expected
D、the US is the major source of lead pollution in arctic snow

正确答案:D

单选题According to the passage, the scientists carried out their researches on ______.A smokers from different parts of the worldB smokers from different states in the United StatesC actors and actresses who smoke a lotD wait staff and bartenders

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