Annealing

Annealing is a way of making metal softer by heating it and then letting it cool very slowly, if metal is heated and then cooled very quickly, for example by dipping(浸) it in water, it will be very hard but also very brittle(脆)—that is, it will break easily. Metal that has been annealed is soft but does not breaks as easily. It is possible to make metal as hard or as soft as is wished, by annealing it. The metal is heated, and allowed to cool slowly for a certain length of time. The longer the heated metal takes to cool slowly, the softer it becomes. Annealing can also be used on other material, such as glass.

1. Annealing can make metal ____

　　A. hard and tough(韧)　B. hard but brittle　　C. soft but tough　　D. soft and brittle

2. Why do people put hot metal in water?

　　A. To make it hard.　　B. To make it soft.　C. To make it cool.　D. To make it brittle

3. In annealing, the required hardness of a metal depends on 　______

　　A. the quantity of water used　B. the temperature of the metal

　　C. the softness of the metal　  D. the timing of the operation

4. As suggested by the text, how can glass be made less brittle?

　　A. It can be heated and then cooled quickly.

　　B. It can be cooled and then heated slowly.

　　C. It can be heated and then cooled slowly.

D. It can be cooled and then heated quickly.

阅读下面短文，掌握其大意，然后从各题所给的四个选项中，选出一个最佳答案.

　　Jungle country is not friendly to man, but is possible to survive there. You must have the right 1 and you must 2 a few important things about the jungle. Then your chances of staying 3 are very good. In the jungle, you should always carry a 4 , Then you can 5 which way to go. Again and again you must alert（警惕）your 6 by it. Keep 　　 7 . 8 the ground in front of you carefully. Stop and listen 　　 9 .

　　If you lose your 10 , do not be 11 . Mark the 12 where you are with blazes on a tree. Then you can always know where you started.

　　Finding water that is safe to drink can be a 13 . Many streams and rivers carry germs that can be 14 to man. 15 , the jungle has many kinds of plants and vines that give water.

　　 16 in the jungle is a science. Learn as much as you can about what to 17 in the jungle. Then no part of the jungle will seem completely unfriendly or 18 . 19 , you will be able to“ 20 ”it for a long time.

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阅读下面短文，从每题所给的四个选项中，选出最佳答案。

Hi, dear boys and girls! Do you know how to be a healthy kid? Here are some rules you should follow.

First, eat different foods, especially fruit and vegetables. You may have a favorite food, but you'd better eat something different, if you eat different foods, you will probably get more nutrients (营养物质) your body needs.

Then, drink water and milk as often as possible. When you're really thirsty, cold water is the No. l choice. Milk is a great drink that can give you more calcium (钙) your body needs to grow strong bones .

Next, listen to your body. How do you feel when you are full? When you are eating, notice how your body feels and when your stomach feels comfortably full. Eating too much will not make you feel comfortable and make you fat.

Afterwards, limit (限制) screen time. Screen time is the time you watch TV, DVDs and videos, or using computers. It is good to take more exercise such as basketball, bike riding and swimming. You can't watch TV for more than two hours a day.

Finally, be active. One thing you'd like to do as a kid is to find out which activity you like best. Find ways to be active every day.

Follow these rules and you can be a healthy kid.

You have to eat different kinds of foods especially _________.

A. meat 　　B. hamburgers　    C. sweets      D. fruit and vegetables　

Which kind of drinks can give you more calcium?

A. Juice.　　    B. Milk.　　　　C. Cold water.　D. Tea.

According to the passage, how many rules should you follow if you want to be healthy?

A. Five.　　      B. Nine.　　　　　   C. Fifteen.　　　D. Thirteen.

According to the passage, which of the following is TRUE?

A. When you're eating, you don't have to pay attention to how your body feels.

B. You can eat your favorite food as much as you can .

C. You can watch TV whenever you like to get more information.

D. We should try to live in an active way in our life.

Which is the best title of the passage?

A. How to make yourself popular        B. How to be a healthy kid

C. How to be a popular kid           D. How to make your parents healthy

People travel for a lot of reasons. Some tourists go to see battlefields or other historic remains. Others are looking for culture, or simply want to have their pictures taken in front of famous places. Most European tourists are looking for a sunny beach to lie on.

Northern Europeans are willing to pay a lot of money for the sun because they have so little of it. People of cities like London, Copenhagen and Amsterdam spend much of their winter in the dark because the days are so short, and much of the rest of the year in the rain . This is the reason why the Mediterranean has always attracted them. Every summer many people travel to Mediterranean resorts（度假胜地）and beaches for their vacation. They all come for the same reason: sun!

The huge crowds mean lots of money for the economics of Mediterranean countries. Italy's 30,000 hotels are booked  every  summer. And 13 million people camp put on French beaches, parks and roadsides. Spain's long sandy coastline attracts more people than anywhere else. 37 million tourists visit there yearly, or one tourist for each person living in Spain.

But there are signs that the area is getting more tourism than it can deal with. The Mediterranean is already one of the most polluted seas on earth. None of these,　however, is mining anyone's fun. Obviously, they don't go there for clean water. They allow traffic jams and seem to like crowded beaches. They don't even mind the pollution. No matter how dirty the water is, the coastline still looks beautiful. And as long as the sun shines, it's still better than sitting in the cold rain in Berlin, London, or Oslo.

The writer seems so imply that Europeans travel mostly for the reason that ________.

A. they want to see historic remains

B. they wish to escape from cold, dark and rainy days

C. they would like to take pictures in front of famous places

D. they are interested in different cultural and social customs

According to the passage, which of the following countries attracts more tourists than the others?

A. Italy　　　　 B. Greece.　　　　 C. France.　　　　 D. Spain.

The underlined part  "one tourist for each person living in Spain" means ________.

A. all the 37 million people living in Spain are tourist

B. every person living in Spain has to take care of a tourist

C. every year almost as many tourists visit Spain as there are people living in that country

D. every family in Spain is visited by a tourist every year

According to the passage, which of the following might ruin the tourists' fun at Mediterranean resorts and beaches?

A. Polluted water　　　 B. Crowded buses. 　　C. Rainy weather.　　　 D. Traffic jams.

A passenger told an air hostess that he needed a cup of water to take his medicine when the plane just took off. She told him that she would 　 1　 him the water in ten minutes.

Thirty minutes later, when the passenger’s ring for 　2 sounded, the air hostess realized it at once. She was kept so 　 3 that she forgot to deliver him the 　4 . As a result, the passenger was held up (延误) to take his medicine. She hurried over to him 　5 a cup of water, but he 　6 it.

In the following hours on the flight, each time the stewardess? passed by the 　 7　 , she would ask him with a 　8 whether he needed help or not. But the passenger never paid attention to her.

When he was going to get 　 9 　 the plane, the passenger asked the air hostess? to 　___10___ him the passengers?’ booklet(意见簿). She was very 　 11　 . She knew that he would write down sharp words, 　___12___ with a smile she handed it to him.

Off the plane, she 　13 the booklet, and cracked a smile, 　14 the passenger put it, “On the flight, you asked me whether I need help or not for twelve times 　15 . How can I refuse your twelve sincere smiles?”

That’s right! Who can refuse your twelve sincere smiles from a person?

1. A. take　 　　　　 B．bring　 　　　　　　　　 C．carry　　 　　　　　 D．hold

2. A. food　 　　　　 B．drink　 　　　　　　　 C．service　 　　　　　 D．medicine

3. A. tired　 　　　　 B．silent　 　　　　　　　　 C．calm　　 　　　　　 D．busy

4. A. water　 　　　　 B．help　　 　　　　　　　 C．milk　　 　　　　　 D．warning

5. A. for　 　　　　　 B．about　 　　　　　　　 C．with　　 　　　　　 D．in

6. A. refused　 　　 B．accepted 　　　　　　 C．liked　 　　　　　　　 D．hated

7. A. customer　 　 B．passenger　　 　　　 C．guest　　 　　　　　 D．visitor

8. A. glance 　　　　 B．look 　　　　　　　　　　 C．smile 　　　　　　　　 D．cry

9. A. on　 　　　　　 B．to　 　　　　　　　　　　 C．off　 　　　　　　　　 D．from

10. A. hand　 　　　 B．take　 　　　　　　　　 C．throw　　 　　　　 D．lend

11. A. glad　 　　　　 B．angry　　 　　　　　　 C．curious　　 　　　 D．sad

12. A. So　 　　　　 B．Because　 　　　　　 C．And　　 　　　　　 D．But

13. A. hid　 　　　　 B．tore　 　　　　　　　　 C．opened　 　　　　　 D．closed

14. A. if　 　　　　　 B．for　 　　　　　　　　　 C．after　 　　　　　　 D．when

15. A. in all　 　　　　 B．above all　　 　　　　 C．or else　　 　　　 D．or so