Zinc(锌) is one of about 20 elements necessary for good health. It is present in the body in a very small amount but makes it possible for important chemical actions to be carried out in cells. Scientists are just beginning to discover how zinc and other elements work.

　　Researchers first studied zinc as a way to speed recovery. Dr. Waltor Powys formerly with the United States Air Force noted that the laboratory animals recovered faster when some matters were added to their food. One of these matters was zinc. Dr. Powys later tested the zinc treatment on an American airman recovering from medical operations. The airman who received zinc sulphate(硫酸盐) recovered in half of the usual time. Other doctors studied persons who had a number of strange disorders. The doctors learned that all of these problems were caused by lack of zinc in the body. They treated these disorders successfully by giving the patients zinc sulphate.

　　The amount of zinc in the body can be found by examining blood and hair. A lack of this important element is not uncommon among people in both industrial and developing countries. Zinc is found in most high protein(蛋白质) foods such as meat, milk, fish and eggs. It is also found in whole grains. But many people do not eat enough of these food. Food markets should add these elements so that more people could get needed amount of these necessary matters.

1. Which of the following statements is true?

　　A. Scientists found how zinc works a long time ago.

　　B. People need a large amount of zinc to be healthy.

　　C. Zinc allows important chemical actions to take place in cells.

　　D. Zinc must be used in the course of medical operation.

2. One of the results from the study of zinc is that _______.

　　A. there’s only a little zinc in the human body

　　B. food rich in protein contains more zinc

　　C. some physical problems are caused by lack of zinc

　　D. any patient who receives zinc sulphate gets well immediately

3. The best title for the passage may be _______.

     A. A New Discovery                               B. Zinc and Health

     C. How Zinc Works                               D. Add Zinc to Your Food

Maybe you are an average student. You probably think you will never be a top student. This is not necessary so, however. Anyone can become a better student if he or she wants to. Here is how.　　

1). Plan your time carefully. When you plan your week, you should make a list of things that you can have to do. After making the list, you should make a schedule of your time. First time for eating, sleeping, dressing, etc. Then decide a good, regular time for studying. Don’t forget to set aside enough time fro entertainment. A weekly schedule may not solve all your problems, but it will force you to realize what is happening to your time.　　

2). Find a good place to study. Look around the house for a good study area. Keep this space, which may be a desk or simply a corner of your room. Free from everything but study materials. No games, radios, or television. When you sit down to study, concentrate on the subject. 　　

3). Make good use of your time in class. Take advantage of class time to listen to everything the teachers say. Really listening in class means less work later. Taking notes will help you remember what your teachers say.　　

4). Study regularly. When you get home from school, go over your notes. Review the important points that your teachers mentioned in class. If you want to know what your teacher is going to discuss the next day, read the material in advance. This will help you understand the next class. If you do these things regularly, the material will become more meaningful, and you will remember it longer.　　

5). Develop a good attitude about tests. The purpose of a test is to show what you have learned about a subject. They help you remember your new knowledge. The world won’t end if you don’t pass a test, so don’t be overly worried.　

There are other methods that might help you with your studying. You will probably discover many others after you have tried these.　　

How to Become A Better Student?

General methods	How to	Advantages
plan you time carefully	●     make a list　　 ●     make a 1.	force you to realize 2. is happening to your time
find a good place to study	free of everything but study     3.	you can 4. on the subjects
make good use of your time in class	●listen to everything the teachers say　　 ●take 5.	really listening in class means   6.work later.
study regularly	●     go over your notes　　 ●    7.new materials	Help you 8.it better, remember it longer
develop a good attitude about tests	don’t be 9.worried	remember your new 10.

 

　 Maybe ten?year?old Elizabeth put it best when she said to her father，“But，Dad，you can’t be healthy if you’re dead.”

　 Dad，in a hurry to get home before dark so he could go for a run，had forgotten to wear his safety belt—a mistake 75% of US population make every day.The big question is why.

　 There have been many myths about safety belts ever since their first appearance in cars some forty years ago.The following are three of the most common.

　 Myth Number One: It’s best to be “thrown clear” of a serious accident.

　 Truth: Sorry，but any accident serious enough to “throw you clear” is going to be serious enough to give you a very bad landing.And chances are you’ll have traveled through a windshield (挡风玻璃)or door to do it.Studies show that chances of dying after a car accident are twenty?five times in cases where people are “thrown clear”.

　 Myth Number Two: Safety?belts “trap” people in cars that are burning or sinking in water.

　 Truth: Sorry again，but studies show that people knocked unconscious (昏迷) due to not wearing safety belts have a greater chance of dying in these accidents.People wearing safety belts are usually protected to the point of having a clear head to free themselves from such dangerous situation，not to be trapped in them.

　 Myth Number Three: Safety belts aren’t needed at speeds of less than 30 miles per hour (mph).

　 Truth: When two cars traveling at 30 mph hit each other，an unbelted driver would meet the windshield with a force equal to diving head first into the ground from a height of 10 metres.

1.Why did Elizabeth say to her father，“But，Dad，you can’t be healthy if you’re dead”？

　 A.He was driving at great speed.

　 B.He was running across the street.

　 C.He didn’t have his safety belt on.

　 D.He didn’t take his medicine on time.

2.The reason father was in a hurry to get home was that he 　　　　.

　 A.wasn’t feeling very well　　　　　 B.hated to drive in the dark

　 C.wanted to take some exercise　　　　　 D.didn’t want to be caught by the police

3.According to the text，to be “thrown clear” of a serious accident is very dangerous because

　 you 　　　.

　 A.may be knocked down by other cars

　 B.may get serious hurt thrown out of the car

　 C.may find it impossible to get away from the seat

　 D.may get caught in the car door

4.Some people prefer to drive without wearing a safety belt because they believe 　　　　.

　 A.the belt prevents them from escaping in an accident

　 B.they will be unable to think clearly in an accident

　 C.they will be caught when help comes

　 D.cars catch fire easily

5.What is the advice given in the test?

　 A.Never drive faster than 30 miles an hour.

　 B.Try your best to save yourself in a car accident.

　 C.Never forget to wear the safety belt while driving.

　 D.Drive slowly while you’re not wearing a safety belt.