你了解簡單實用的機械嗎？請根據(jù)下文內(nèi)容選擇相應(yīng)圖片，完成1-4題，并回答第5題。
Amazing Simple Machines Simple machines have few or no moving parts.They work by changing the direction or the amount of a force （力）.The pulley，lever，wedge and inclined plane are four different simple machines.
| （1） D D A pulley can move things from a low place to a higher one.It has a wheel that allows you to change the direction of a force.As you pull down on the rope，the wheel turns and whatever is tied to the other end goes up. |
| （2） A A A lever helps move heavy things.When you push down on one side of a lever，the other side goes up.A seesaw is an example of a lever. |
| （3） C C A wedge is a simple machine used to cut material in parts.Place the thin end of the wedge onto a log and hit it with a hammer.The wedge changes the direction of the force and it pushes the log apart. |
| （4） B B An inclined plane can help you to carry heavy things.It is easier to move heavy things up on an inclined plane than to lift them straight up.You can roll the things along the inclined plane.It takes longer to move it up，but it can save your energy. |
|
D
D
【考點】人與社會．
【答案】D；A；C；B；D
【解答】
【點評】
聲明：本試題解析著作權(quán)屬菁優(yōu)網(wǎng)所有，未經(jīng)書面同意，不得復(fù)制發(fā)布。
發(fā)布：2024/6/27 10:35:59組卷：2引用：1難度：0.8
相似題
-
1．Dear Laura，
Thanks for your message.Yes，I'm having a great time as an （1）estudent in France.I was a bit nervous before I arrived here.But my （2）hfamily is really nice.They go out of their way to make me feel at home.The granddaughter about my age is really kind.She always talks to me in French to help me practise.And you wouldn't believe how quickly my French has （3）i.
My biggest challenge is learning how to do at the dinner table.Things are really different from the way they are at home.For example，you should put your bread on the table （4）iof on your plate.You shouldn't eat anything with your hands except bread，not even fruit!You have to cut it up and （5）eit with a fork.I have to say that it is strange at first，but I'm getting used to it now.
Hope you are having a good school year!發(fā)布：2025/1/30 8:0:1組卷：35引用：3難度：0.5 -
2．閱讀短文，根據(jù)首字母或所給詞的適當(dāng)形式填空，使文章語義通順。
Dear Laura，
Thanks for your message.Yes，I'm having a great time on my exchange program in France.I was a bit nervous before I arrived here，but there was no reason to be.My host family is really nice.They go out of their （1）wto make me feel at home.The grandmother has a teenage granddaughter （2）wis really kind.She always talks to me （3）iFrench to help me practice.My French （4）（improve） quickly since I arrived here! （5）TI still make lots of mistakes，it doesn't worry me as it used to.
Learning how （6）（behave） at the dinner table is a hard part for me.As you can imagine，things are really different from the way they are at home.For example，you shouldn't put your bread on your plate.You （7）（suppose） to put it on the table!Besides，you shouldn't eat anything with your hands except bread.Another thing is that it is very （8）（polite） to say you're full.If you don't want anything else，you should just say， "It was delicious." I find it difficult to remember everything，but I'm （9）（gradual） getting used to it.French customs are not so strange to me any （10）m.
I'll write again soon and tell you more about my life here.Hope you are having a good school year.
Yours，
Lin Yue發(fā)布：2025/1/30 8:0:1組卷：18引用：2難度：0.3 -
3．
Dear Laura，A.For example，you shouldn't put your bread on your plate.
B.I hope to hear from you soon.
C.I'm very comfortable speaking French now.
D.I don't find French customs so strange anymore.
E.Another thing is that it is very impolite to say you're full
F.They go out of their way to make me feel at home.
Thanks for your message .Yes ，I'm having a great time on my student exchange program in France .I was a bit nervous before I arrived here，but there was no reason to be my host family is really nice .（1）.The grandmother has a teenage granddaughter about my age who is really kind.She always talks to me in French to help me practice.And you wouldn't believe how quickly my French has improved!（2）Though I still make lots of mistakes，it doesn't worry me as it used to.
My biggest challenge is learning how to behave at the dinner table.As you can imagine，things are different from the way they are at home.（3）.You're supposed to put it on the table!I thought that was pretty strange at first，but not I'm used to it.You shouldn't eat anything with your hands except bread，not even fruit.You have to cut it up and eat it with a fork.（4）.If you don't want any more food，you should just say，"That was delicious." Also you're not supposed to put your elbows on the table.I have to say that I find it difficult to remember everything，but I'm gradually getting used to it.（5）.
Dear Laura，I'll write again soon and tell you more about my life in France Hope you're having a good school year.
Yours，
Lin Yue發(fā)布：2025/1/30 8:0:1組卷：37引用：2難度：0.4
相關(guān)試卷