Directions:Choose the main idea of the article.(Following are the topic sentences of an article.)
1)A mounting body of evidence suggests that fighting violence with violence rarely deters a crime in progress and greatly increases the chances of changing a robbery into a violent attack on the victim....
2)One report shows that at least 100 thousand handguns are stolen from private owners each year,the vast majority during burglaries....
3)Moreover,a study of robberies in eight American cities states that in less than 4 percent of the crimes did the victim have the opportunity to use a weapon....
Which of the following best reflects the main idea of the article?
Directions:Read the following and choose the title that best expresses the ideas of the passage.
There is a simple economic principle used to determine prices.It is called the law of supply and demand.Supply means the amount of,or access to,certain goods.Demand represents the number of people who want those goods.If there are more goods than wanted,the price of them falls.On the other hand,if the demand for those goods is much greater than the supply, then the price rises.Of course,manufacturers prefer to sell more goods at increased price.
English is clearly an international language.It is spoken by pilots and airport control operators on all the airways of the world.Over 70 percent of the world s radio programs are in English.
本段主题句为首句,其后的内容句均说明首句。例五:
Some students prefer a strict teacher who tells them exactly what to do.Others prefer to be left to work on their own.Still others like a democratic discussion type of class.No one teaching method can be devised to satisfy all students at the same time.
本段中心思想在结尾句得到体现,它是此段内容的结论。例六:
For adults a cold is not that serious.However,this is not the case for children.Cold symptoms in children may be signs of more serious diseases and should be given prompt medical attention.
It s no wonder that we have so many rejections for physical reasons in our Selective Service.Since October of 1948,some six million young men have been examined for military duty.Of these,more than a million were rejected as physically unfit for military service.To get two men today,the United States Army must call seven men.Of the five rejected three are turned down for physical reasons and two for mental problems.To get the 196thousand additional men we needed for Berlin,the government had to call up 750 thousand men.And the rejection rate is increasing each year.The reason for this problem is that we are underexercised as a nation.We look,instead of play.We ride,instead of walk.The way we live prevents us from being healthy.
本段中找不到某一句作为主题。根据文中的内容进行归纳,可找出主题思想,即:“The military s rejection rate for physical reason is increasing because this nation s lack of exercise is leading to poor health.”