Do you know about the Mobius strip（莫比烏斯環(huán)）？It was named after the German mathematician（ 數(shù)學(xué)家） August Mobius because he discovered it in 1858.The special ring is very useful in math study.Let's make one now.
| How to make a Mobius strip | |
| Things we need | ■Paper ■Pencil ■Scissors■ Tape （膠帶） |
| Steps to take | ●Cut a strip of paper about 3 cm wide.Mark a dot on each end of one side. |
| ●Tape the strip into a ring that is twisted （彎曲的） so the dots are on opposite sides. | |
| ●Draw a line on the twisted ring，starting at one dot and going back to the other dot where it starts. | |
| What we find | ●On the twisted ring，the line runs along both sides of the paper and you don't have to lift the pencil to mark both sides. ●How amazing!The Mobius strip has only one side! |
D
D
.A．invented in 1858
B．used in math study
C．made of special paper
D．discovered by August Mobius
（2）Which of the following do we need to make a Mobius strip？
C
C
A．A notebook.
B．An eraser.
C．A pair of scissors.
D．A ruler.
（3）We need
B
B
steps to make a Mobins strip.A．two
B．three
C．four
D．five
（4）What can we find after making the twisted ring？
A
A
A．The line runs along both sides of the paper.
B．We can get a straight line between the two dots.
C．It's amazing that the Mobius strip has two sides.
D．We have to lift the pencil when drawing the line.
（5）Where can we probably read the passage？
D
D
A．In a storybook.
B．In a travel guidebook.
C．In a sports magazine.
D．In a science newspaper.
【答案】D；C；B；A；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：2024/5/27 14:0:0組卷：44引用：1難度：0.7
相似題
-
1．（1）這個用英文怎么說？ Oh，it's a photo．（2）Who are in the photo？They are my family．The man（男人） in a yellow jacket is my grandfather．His name is Mike King．He has one son and one daughter．The woman is my mother．Her name is Nancy．（3）She is my grandfather's daughter．This is my father．He is English．His jacket is red．（4）His telephone number is 556-4382．This is me．My name is Bill．This is my brother John and that is my sister Mary．We are in Beijing，China now．We are in Xin Hua Middle School．What's that？It's my dog． （5）它是黑白相間的．We all（全部） like it．
將劃線部分的句子譯成漢語或英語．
（1）
（2）
（3）
（4）
（5）發(fā)布：2025/1/7 8:0:2組卷：32引用：3難度：0.5 -
2．Dear Laura，
Thanks for your message．Yes，I'm having a great time on my student exchange（交流）programme in France．I was a bit（1）before I arrived here，but there was no need to be．My host family is really nice．
They try to make me（2）at home．The grandmother knows that I miss Chinese food a lot．So she actually learned how to（3）Chinese food！She also has a teenage granddaughter about my age who is really（4）．She always talks to me in French to help me practise．You wouldn't（5）how quickly my French has improved．（6）I still make lots of mistakes，it doesn't worry me as it used to．
My biggest（7）is learning how to act at the dinner table．As you can imagine，things are very different from the way they are at home．For example，you shouldn't put your elbows（胳膊肘）on the table．（8），I thought that was pretty strange，but now I'm used to（習(xí)慣于）it．Another example is that you shouldn't eat anything with your（9）except bread，not even fruit．You have to cut it up and eat it with a fork．Another thing is that it's impolite to say you're full．If you don't want any more（10），you should just say，"That was delicious．"I have to say that I find it difficult to（11）everything，but I'm gradually（逐漸地）getting used to it．I don't find French customs so（12）any more．
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（1） A．proud B．excited C．nervous D．disappointed （2） A．stay B．feel C．rest D．study （3） A．cook B．serve C．fetch D．taste （4） A．clever B．shy C．kind D．honest （5） A．discover B．hear C．a(chǎn)gree D．believe （6） A．If B．Although C．Because D．Since （7） A．problem B．hobby C．dream D．suggestion （8） A．In fact B．By the way C．So far D．At first （9） A．fork B．fingers C．knife D．chopsticks （10） A．food B．time C．money D．help （11） A．create B．a(chǎn)nswer C．remember D．repeat （12） A．simple B．strict C．different D．strange 發(fā)布：2025/1/30 8:0:1組卷：168引用：1難度：0.7 -
3．A man was sick and tired of going to work every day and his wife stayed home.He thought it was unfair so he wanted her to see what he went through.He prayed one day： "I go to work every day and work very hard for eight hours（1）
my wife stays at home.I want her to know about my hard life，so please create a trade in our（2）."
The next morning，the man was（3）to wake up as a woman.He got out of bed，cooked break-fast for his family，woke up his kids，set out their school clothes，fed them breakfast.After that，he prepared the lunches for the kids and（4）the luncjye.ais.He then drove them to school，came home and took all the（5）that needed dry cleaning to the cleaners and stopped at the bank to take out some money，went to the supermarket and（6）returned home.
But he（7）couldn't rest after getting home.He cleaned the cat's litter box and bathed the dog.
By then it was already 1：00 p.m.He hurried to finish the chores.When he finished all the work，he ran to school to（8）the kids.He brought them home，helped them with their homework and then headed into the kitchen.
By then it was 4：30 p.m.，so he began（9）potatoes and washing lettuce for salad.He prepared the meat and fresh vegetables.And he got（10）ready in time for an early dinner.After dinner，he cleaned the kitchen，did the dishes，folded the clothes，bathed the kids，and put them to bed.By 9 p.m.jye.ai was already（11）tired to do anything，so he couldn't wait to go to bed himself.
The next morning，（12）he woke up，he prayed， "I was so（13）to envy" my wife's being able to stay home all day.Oh please，let our bodies trade back. "Since then，he loved his wife much more after spending a day in her（14）.
So everyone，when you envy others and feel unlucky about（15），you can stand in others' shoes to see if it is easy for you.In this way，you may be happier about your own life.（1） A．a(chǎn)fter B．before C．while D．if （2） A．mind B．rooms C．jobs D．bodies （3） A．surprised B．a(chǎn)ngry C．disappointed D．sad （4） A．bought B．cooked C．a(chǎn)te D．packed （5） A．money B．clothes C．dishes D．food （6） A．slowly B．a(chǎn)ctually C．finally D．suddenly （7） A．still B．even C．a(chǎn)gain D．just （8） A．pick out B．pick up C．pick off D．pick on （9） A．washing B．peeling C．choosing D．planting （10） A．everything B．a(chǎn)nything C．nothing D．something （11） A．quite B．very C．so D．too （12） A．a(chǎn)s far as B．a(chǎn)s long as C．a(chǎn)s soon as D．a(chǎn)s quickly as （13） A．happy B．wrong C．proper D．wise （14） A．shoes B．house C．brain D．housework （15） A．himself B．myself C．themselves D．yourself 發(fā)布：2025/1/5 10:0:6組卷：7引用：1難度：0.4
相關(guān)試卷