A single cannabis joint (大麻烟卷) may cause as much damage to the lungs as five chain-smoked cigarettes,research has found. Medical examinations of cannabis and tobacco smokers found the drug increased lung problems.

Smoking one cannabis cigarette caused damage equal to smoking 2. 5 to 5 tobacco cigarettes,researchers at the Medical Research Institute ofNew Zealandfound. Doctors who carried out the study believe the greater damage is connected with the difference in the way cannabis is usually smoked,with users inhaling hard,holding their breath longer and failing to use filters.

The scientists began to look into whether smoking cannabis put users in greater danger of developing emphysema (肺气肿) .

A group of 339 volunteers aged 18 to 70 were divided into four groups according to whether they smoked only cannabis,only tobacco,both,or were non-smokers. Each volunteer went through lung function tests and X-ray scans(扫描) of their chests to measure the level of damage to their lungs and airways.

In the study,published in the journal Thoraxall smokers had coughs and wheeze(气喘) ,while only tobacco smokers showed signs of emphysema. Coughing reduced among people who smoked cannabis and tobacco,possibly because these people smoked pure cannabis cigarettes.

The level of lung damage was directly related to the number of cigarettes

smoked. “The most important finding was that one cigarette of cannabis was

similar to the effect of 2. 5 to 5 tobacco cigarettes in causing airflow obstruc-tion(阻碍) ,” the authors stated. “This pattern is likely to be related to the different characteristics(特征) of the cannabis cigarette and the way in which it is smoked. ”

“Cannabis is usually smoked without a filter,and is smoked at a higher temperature,”they added.

1. What would be the main idea of the passage?

   A. Cannabis cigarettes damage lungs more than tobacco cigarettes.

   B.  Cannabis cigarettes are more dangerous than tobacco cigarettes.

   C.  Medical examinations of cannabis and tobacco smokers.

   D.  Cannabis cigarettes damage the lungs as much as tobacco cigarettes.

2. The underlined word “inhaling ” in Paragraph 2 probably means “     

   A. breathing out   B. breathing in

   C.  breathing   D. smelling

3. According to the research,smoking cannabis cigarettes caused greater damage to lungs mainly because          .

   A. cannabis cigarettes contain more dangerous chemical substances

   B.  smoking cannabis can increase the danger of developing lung cancer

   C.  the way cannabis is usually smoked is different and special

   D.  cannabis is more addictive

4. Which of the following statements is TRUE according to the passage?

   A. Tobacco smokers have a greater danger of developing emphysema.

   B.  The study shows that all volunteers tested have coughs and short breath.

   C.  Tobacco cigarettes cause greater airflow obstruction than cannabis cigarettes.

   D.  Cannabis should be smoked without a filter.

5. If the passage appears in a newspaper,which section is the best suitable one?

   A. Education Section.

   B.  Show Section.

   C.  Environment Section.

   D.  Health Section.

  Music is the food of love,according to poets. And classical music,it seems,may be fine rain for restaurants. The music of Mozart,Bach and Beethoven played in restaurants makes diners feel richer and encourages them to spend money,according to the research made by the University of Leicester in centralEngland.

“When you hear a piece of music,it activates(激活)   all types of knowledge,^ said Adrian North,a senior lecturer in psychology at a university who carried out tests in a restaurant near Leicester over a period of three weeks. “If you hear classical music,it gives you the feeling of wealth and it makes you feel a bit noble.In a restaurant,this has the effect of making you spend a bit more money. ” Researchers found that classical music,often connected with wealth,was the most successful in encouraging people to pay cash,with diners spending more than 24 pounds a head.

But when the music was Britney Spears’,diners spent less than 22 pounds a head,they found. With no background music,spending fell to around 21 pounds. “Where people were really spending the money was on the luxurious(奢侈的) thingssuch as desserts and coffees,” said James Davis, owner of Softleys Restaurant in Market Bosworth,where the research was carried out. He also said, “I think this research will certainly affect what we will play in the future. ”

1. How did people feel while listening to classical music?

   A. They only feel noble.

   B.  They feel they are luxurious.

   C.  They feel that they are a little noble and wealthy.

   D.  They have the feeling that money is less important.

2. Which music has the most obvious effect on people’s spending?

   A. Britney Spears’ music.

   B.  Classical music.

   C.  Pop music.

   D.  Not mentioned in the passage.

3. What does the underlined sentence mean?

   A. People like to have desserts and coffees.

   B.  The desserts and coffees are very expensive.

   C.  People spend money in enjoying music in restaurants.

   D.  Having desserts and coffees makes people spend more money.

4. It can be inferred from the passage that          .

   A. James Davis might accept the idea

   B.  most people don’t believe the idea

   C.  restaurants will never play Britney Spears’music

   D.  every restaurant will play classical music in the future

5. What is the best title of the passage?

   A. Classical music makes diners spend more money

   B.  Music and restaurants

   C.  Diners love music

   D.  Music is the food of love

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