Question

【题目】根据短文理解，选择正确答案。
People have smoked cigarettes for a long time now. The tobacco which is used to make cigarettes was first grown in what is now part of the United States. Christopher Columbus, who discovered America, saw the Indians smoking. Soon the dried leaves were transported to Europe. In the late 1800s, the Turks made cigarettes popular.
Cigarette smoke contains at least two harmful substances, tar and nicotine. Tar, which forms as the tobacco burns, damages the lungs and therefore affects breathing. Nicotine, which is found in the 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 their stomachs. 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 and feet. It plays an important role in increasing smokers' risk of heart disease and stroke.
Smoking cigarettes is dangerous. Cigarette smoking was the cause of lung cancer and several other deadly diseases.
（1）Tobacco first appeared in ________.
A.Asia
B.Africa
C.Europe
D.America
（2）What is the main purpose of the first paragraph?
A.To tell us the bad effects caused by smoking cigarettes.
B.To introduce the history of smoking.
C.To let us know what the cigarettes are made from.
D.To tell the readers that Columbus found the Indians smoking.
（3）The following effects are caused by Nicotine EXCEPT that ________.
A.it can make new smokers feel dizzy or sick to their stomachs
B.it lowers skin temperature
C.it causes the heart to beat less fast
D.Nicotine will probably kill a person if a smoker takes in too much of it.
（4）What's the main idea of this passage?
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?

Answer 1

【答案】
（1）D
（2）B
（3）C
（4）B
【解析】本文介绍了烟草的起源以及抽烟的危害。

⑴细节理解。根据文章第一段The tobacco which is used to make cigarettes was first grown in what is now part of the United States.可知，烟草首次出现在美洲。所以答案是D。

⑵段落大意。通读第一段可知，这一段介绍了烟草的起源以及传播，即抽烟的历史。所以答案是B。

⑶细节理解。从文章二三段的描述可推断A、B、D正确。根据文章第二段内容Nicotine, which is found in the leaves, causes the heart to beat faster and increases the breathing rate.可知，尼古丁会导致心跳加快，故此题C项表述不正确。所以答案是C。

⑷主旨大意。通读全文可知，文章主要讲述了抽烟对身体危害，所以答案是B。