Annealing is a way of making metal softer by ...

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 break 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 materials, 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.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.

高一英语阅读理解中等难度题查看答案及解析

If metal is heated and then cooled very quickly, ________, by dipping in cold water, it will be very hard but will break easily.

高一英语单项填空简单题查看答案及解析

If metal is heated and then cooled very quickly, 　　 ,put in cold water, it will become very hard but will break easily.

A. if so　　 B. to give an example

C. in other words　　 D. in conclusion

高一英语单项填空简单题查看答案及解析

There is no way to make somebody stop smoking,and just like with users of any drug,it is very unlikely a person will stop unless he or she wants to.1.

Step One: Make Observations

Smoking use can affect memory and make it difficult for people to do well at work or school.Other bad effects that you may notice include:2.Is she getting sick more often than she used to?

Write down your concerns using “I” statements,such as “I feel sad that when you smoke you give up your artwork.”3.

Step Two: Approach the Person

Bring up your concerns to your friend at a relaxing time.Express your concerns using the statements you wrote down.Tell him you will be there to support him if and when she decides to give up smoking.He will likely give you one of three responses:

He wants to quit.

4.

He wants to stop,but not yet.

You must be willing to calmly accept any of these responses.If he says he does want to stop,go on with the next step.If not,they will have to be visited later when he is ready.

Step Three: Prevent Him Giving Up Halfway

5.However,symptoms only appear after some time of quitting smoke.This causes some who are addicted to believe that they are not actually addicted and to start using again.

A.He doesn’t want to quit.

B.Does this person appear more nervous?

C.Are you lazy because you smoke too much?

D.It’s best to approach the person in this manner.

E.People can become physically dependent on smoking.

F.The drug can stay in the system for a long period of time.

G.But there are steps you can take to support a friend or family member.

高一英语七选五中等难度题查看答案及解析

Statistically, air travel is by far the safest way to travel, and you can make flying even safer, just by following these simple rules. As your chances of being involved in an air accident are practically nil（零）, many of these rules concern what you should and shouldn't do to make your journey safer when you are in the air.

Fly on non-stop routes

Most accidents occur during the take-off, climb, descent and landing period of a flight, so flying non-stop reduces your exposure to these complex procedures.

Choose larger aircraft

Although small aircraft have very good safety records, those with more than 30 passenger seats are designed to comply（遵守）with much stricter regulations and are tested more regularly to make sure they still comply. Also, in the unlikely event of a serious accident, larger aircraft provide a better opportunity for passenger survival.

Pay attention to the pre-flight safety briefing (简报)

The information may seem repetitious（重复的）, but it's worth listening to the flight attendants. And even if you’ve flown before, it doesn’t mean you know everything about the aircraft you're on, such as the location of the closest emergency exit.

Store things safely

Never put very heavy articles in the overhead storage bins. They may fall out when someone opens the bin and cause injury. Also, the bin may not be able to hold heavier objects during turbulence（气流）.

Keep our seat belt fastened while you are seated

Cabin crew always tell you this, but it’s important. You would be seriously injured if the plane hits unexpected turbulence. Always fasten your seat belt if you are told to. The general rule of flying is this: If you are told to do something, do it first and ask questions later.

Let the flight attendant pour your hot drinks

Flight attendants are trained to handle hot drinks like coffee or tea in a crowded aisle on a moving aircraft, so allow them to pour the drink and hand it to you. Never ask to take a coffee pot from one of them.

1.Whom is the passage meant for?

A.Pilots.

B.Flight attendants.

C.Passengers.

D.Airlines.

2.The underlined word “those” in the second tip refers to”______” .

A.smaller planes

B.passengers

C.larger aircrafts

D.safety records

3.Which of the following is not true according to the passage?

A.Larger planes have more safety checks and are safer.

B.Take-off is safer on non-stop flights than landings.

C.Every aircraft is different, so the safety procedures may be different.

D.Seat belts should be worn to protect against turbulence.

4.The best title of the passage should be”_____”.

A.The safest way to travel

B.Air safety tips

C.Non-stop routes

D.How to fly a plane

高一英语阅读理解中等难度题查看答案及解析

The best way of learning a language is by using it. The best way of learning English is talking in English as much as possible.

Sometimes you will get your words mixed up and people will not understand you. Sometimes people will say things too quickly and you can’t understand them. But if you keep your sense of humor，you can always have a good laugh at the mistake you make. Don’t be unhappy if people seem to laugh at your mistakes. It’s much better for people to laugh at your mistakes than to be angry because they don’t understand what you are saying. The most important rule for learning English is “Don’t be afraid of making mistakes, everyone makes mistakes.”

1.The most important thing in learning a language is ____.

A. laughing　　　　 B. writing

C. remembering　　 D. practicing

2.In learning English, you should ____.

A. speak as quickly as you can

B. laugh as much as you can

C. use it as often as you can

D. write more than you read

3.When you make a mistake you’d better ____.

A. do the same thing again

B. ask others for help

C. have a sense of humor

D. run away

4.When people laugh at your mistakes, you should ____.

A. not be unhappy　　　　　　　　　 B. be angry with them

C. be more careful　　　　　　　　 D. not speak English any more

高一英语阅读理解中等难度题查看答案及解析

As there is less and less coal and oil, scientists are exploring new ways of making use of ____ energy, such as sunlight, wind and water for power and fuel.

高一英语单项填空中等难度题查看答案及解析

Camping wild is a wonderful way to experience the natural world and, at its best, it makes little environmental influence. But with increasing numbers of people wanting to escape into the wilderness, it is becoming more and more important to camp unobtrusively(不引人注目地)and leave no mark.

Wild camping is not permitted in many places, particularly in crowded lowland Britain. Wherever you are, find out about organizations responsible for managing wild spaces, and contact them to find out their policy on camping and shelter building. For example, it is fine to camp wild in remote parts of Scotland, but in England you must ask the landowner’s permission, except in national parks.

Camping is about having relaxation, sleeping outdoors, experiencing bad weather, and making do without modern conveniences. A busy, fully-equipped campsite(野营地)seems to go against this, so seek out smaller, more remote places with easy access to open spaces and perhaps beaches. Better still, find a campsite with no road access: walking in makes a real adventure.

Finding the right spot to camp is the first step to guaranteeing(保证）a good night’s sleep. Choose a campsite with privacy and minimum influence on others and the environment. Try to use an area where people have obviously camped before rather than creating a new spot. When camping in woodland, avoid standing dead trees, which may fall on a windy night. Avoid animal runs and caves, and possible homes of biting insects. Make sure you have most protection on the windward side. If you make a fire, do so downwind of your shelter. Always consider what influence you might have on the natural world. Avoid damaging plants. A good campsite is found, not made—changing it should be unnecessary.

1. You needn’t ask for permission when camping in______________ .

A. national parks in England     B. most parts of Scotland

C. crowded lowland Britain      D. most parts of England

2. The author thinks that a good campsite is one_______________.

A. with easy access            B. used previously

C with modern conveniences     D far away from beaches

3. The last paragraph mainly deals with_____________.

A. protecting animals          B building a campfire

C camping in woodland        D finding a campsite with privacy

4. The passage is mainly about______________.

A the protection of campsites

B the importance of wild camping

C the human influence on campsites

D the dos and don’ts of wild camping

高一英语阅读理解中等难度题查看答案及解析

Camping wild is a wonderful way to experience the natural world and, at its best, it makes little environmental influence. But with increasing numbers of people wanting to escape into the wilderness, it is becoming more and more important to camp unobtrusively(不引人注目地) and leave no mark.

Wild camping is not permitted in many places, particularly in crowded lowland Britain. Wherever you are, find out about organizations responsible for managing wild spaces, and contact them to find out their policy on camping and shelter building. For example, it is fine to camp wild in remote parts of Scotland, but in England you must ask the landowner’s permission, except in national parks.

Camping is about having relaxation, sleeping outdoors, experiencing bad weather, and making do without modern conveniences. A busy, fully-equipped campsite(野营地) seems to go against this, so seek out smaller, more remote places with easy access to open spaces and perhaps beaches. Better still, find a campsite with no road access: walking in makes a real adventure.

Finding the right spot to camp is the first step to guaranteeing a good night’s sleep. Choose a campsite with privacy and minimum influence on others and the environment. Try to use an area where people have obviously camped before rather than creating a new spot. When camping in woodland, avoid standing dead trees, which may fall on a windy night. Avoid animal runs and caves, and possible homes of biting insects. Make sure you have most protection on the windward side. If you make a fire, do so downwind of your shelter. Always consider what influence you might have on the natural world. Avoid damaging plants. A good campsite is found, not made—changing it should be unnecessary.

1.You needn’t ask for permission when camping in ________.

A.national parks in England B.most parts of Scotland

C.crowded lowland Britain D.most parts of England

2.The author thinks that a good campsite is one ________.

A.with easy access B.used previously

C.with modern conveniences D.far away from beaches

3.The last paragraph mainly deals with ________.

A.protecting animals B.building a campfire

C.camping in woodland D.finding a campsite with privacy

4.The passage is mainly about ________.

A.the protection of campsites B.the importance of wild camping

C.the human influence on campsites D.the dos and don’ts of wild camping

高一英语阅读理解中等难度题查看答案及解析

Camping wild is a wonderful way to experience the natural world and, at its best, it makes little environmental influence. But with increasing numbers of people wanting to escape into the wilderness, it is becoming more and more important to camp unobtrusively(不引人注目地)and leave no mark.

Wild camping is not permitted in many places, particularly in crowded lowland Britain. Wherever you are, find out about organizations responsible for managing wild spaces, and contact them to find out their policy on camping and shelter building. For example, it is fine to camp wild in remote parts of Scotland, but in England you must ask the landowner’s permission, except in national parks.

Camping is about having relaxation, sleeping outdoors, experiencing bad weather, and making do without modern conveniences. A busy, fully-equipped campsite(野营地)seems to go against this, so seek out smaller, more remote places with easy access to open spaces and perhaps beaches. Better still, find a campsite with no road access: walking in makes a real adventure.

Finding the right spot to camp is the first step to guaranteeing a good night’s sleep. Choose a campsite with privacy and minimum influence on others and the environment. Try to use an area where people have obviously camped before rather than creating a new spot. When camping in woodland, avoid standing dead trees, which may fall on a windy night. Avoid animal runs and caves, and possible homes of biting insects. Make sure you have most protection on the windward side. If you make a fire, do so downwind of your shelter. Always consider what influence you might have on the natural world. Avoid damaging plants. A good campsite is found, not made—changing it should be unnecessary.

1.You needn’t ask for permission when camping in ________.

2.The author thinks that a good campsite is one ________.

3.The last paragraph mainly deals with ________

4.The passage is mainly about________

高一英语阅读理解困难题查看答案及解析