题目列表(包括答案和解析)
| WHAT YOU’LL NEED: ● Soap ● Water ● Your hands! WHAT TO DO: 1. Make sure your hands are dry. 2. Rub your hands together until you feel the heat of your hands. 3. Now, use soap and water to get your hands very slippery (滑的). 4. Try to make friction happen while your hands are slippery. 5. Please write down what has happened. LET’S TALK! Friction is an energy that happens when two things rub together. When friction happens, it makes heat! When your hands are slippery, they won’t make very much friction and your hands won’t get so hot. DID YOU KNOW? 1. Friction happens when you stop your fast running bike. 2. Ancient people made fires by rubbing two pieces of wood together. Friction happened though they didn’t know it. ? Friction is everywhere. Have you ever noticed situations where friction is happening? If not, ask your parents to take you out in a car. If it is not too hot, touch the tires (轮胎) of the car before and after a short drive to see how much warmer they get from friction. |
| A.slippery | B.dry | C.wet | D.smooth |
| A.摩擦 | B.冷却 | C.膨胀 | D.震动 |
| A.Bike riding | B.Car driving | C.Hands rubbing | D.Friction discovering |
| A.THINK IT OVER! | B.WHAT HAPPENED? |
| C.EVERYDAY ACTION: | D.WORK WITH PARENTS! |
| A.a science report | B.a car advertisement |
| C.a rubbing introduction | D.a chemistry programme |
| A.she didn't like the job | B.she didn’t expect the examiner would ask such a question |
| C.she didn't want to answer the question | D.her parents would be angry if she didn't ask them |
| A.the company lost its best clerk | B.no girl got the job |
| C.the other girl who failed at the last interview might get the job | |
| D.the examiner was very pleased with the girl |
| A.a person's confidence | B.a person's knowledge |
| C.a person's age | D.a person' s beautiful looks |
| A.就在鼻子下 | B.想要得到的 | C.没有把握的 | D.就在眼前的 |
| A.Make Decisions With Your Parents | B.A Successful Interview |
| C.Use Your Own Mind | D.Answer the Examiner's Question Quickly |
Have you ever stayed in a hotel? Most Chinese hotels often provide guests(客人) with things like disposable (一次性的) toothbrushes, toothpaste, shampoo and slippers. Many guests like the idea because they don’t have to bring their own. But, if you travel to Beijing, remember to bring your own things. Starting from June, some hotels in Beijing will no longer provide guests with these disposables. They want to ask people to use less disposable things.
Many disposable things are made of plastic. People throw them away after only using them once. It is a waste of natural resources (资源) and is very bad for the environment. Do you know, one Chinese person makes as much as 400kg of waste a year! Most of that waste comes from disposable things. In Beijing, people throw away about 19,000 tons of plastic bags and 1,320 tons of plastic lunch bowls every year! Plastic can take between 100 and 400 years to break down. So the less plastic we throw out, the better. So, wherever you travel, bring your own things and use them again and again.
Back at home and school, you can also do something to make our world a better place. Try to do these things in your daily life: Use cloth shopping bags, not plastic ones. After using a plastic bag, wash it out and let it dry. Then you can use it over and over again. Do not use paper cups. At your school dining-room, use your own bowl and chopsticks instead of disposable ones.
To protect our environment and our home, it is very necessary and important for us to save natural resources.
( ) 11. Why do many hotels provide guests with some disposable things?
A. Let their guests be convenient during their traveling.
B. Hope their guests use less disposable things.
C. Wish their guests to save money.
D. Want their guests to use more disposable things.
( ) 12. Some Beijing hotels will no longer provide guests with _________.
A. cheap food and drink B. disposable things
C. good service D. free TV programs
( ) 13. Which of the following is NOT true?
A. Many disposable things are made of plastic.
B. Throwing disposable things away is a waste of natural resources.
C. Plastic is very bad for the environment.
D. Plastic breaks down easily.
( ) 14. What can we do to make our world a better place at home and school?
A. Use shopping bags made of plastic.
B. Do not throw away paper cups.
C. Use disposable plates, bowls and chopsticks.
D. Don’t forget to reuse daily necessities(日用品).
( ) 15. We can tell from the story that ________.
A. people don’t like disposable things at all
B. we can’t use paper or plastic bowls at school
C. we should use less plastic things and protect our environment
D. hotels won’t provide disposable things because they want to save money
Have you ever stayed in a hotel ? Most Chinese hotels often provide guests with things like disposable(一次性的) toothbrushes , toothpaste , shampoo, and slippers. Many guests like the idea because they don’t have to bring their own . But , if you travel to Beijing , remember to bring your own things. Starting from now on , some hotels in Beijing will no longer provide guests with these disposables. They want to ask people to use less disposable things.
Many disposable things are made of plastic. People throw them away after only using them once. It is a waste of natural resources and is very bad for the environment . Do you know , one Chinese person makes as much as 400Kg of waste a year! Most of that waste comes from disposable things. In Beijing , people throw away about 19,000 tons of plastic bags and 1,320 tons of plastic lunch bowls every year! Plastic can take between 100 and 400 years to break down. So the less plastic we throw out, the better. So, wherever you travel , bring your own things and use them again and again .
Back at home and school, you can also do something to make our world a better place .Try to do these things in your daily life: Use cloth shopping bags , not plastic ones. After using a plastic bag , wash it out and let it dry. Then you can use it over and over again. Do not use paper cups. At your school canteen(食堂), use your own bowl and chopsticks instead of disposable ones.
【小题1】Why do many hotels provide guests with some disposable things ?
| A.Let their guests be convenient during their travelling . |
| B.Hope their guests use less disposable things. |
| C.Wish their guests to save money. |
| D.Want their guests to use more disposable things . |
| A.cheap food and drink | B.disposable things | C.good service | D.free TV programs |
| A.Many disposable things are made of plastic. |
| B.Throwing disposable things away is a waste of natural resources . |
| C.Plastic is very bad for the environment . |
| D.Plastic can be broken down easily. |
| A.Use shopping bags made of plastic |
| B.Use disposable plates , bowls and chopsticks . |
| C.Do not throw away paper cups. |
| D.Do not forget to reuse daily necessities (必需品). |
| A.people don't like disposable things at all. |
| B.we can't use paper or plastic bowls at school |
| C.We should use less plastic things and protect our environment |
| D.hotels won’t provide disposable things because they want to save money |
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