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(diǎn)評】
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發(fā)布：2024/5/27 14:0:0組卷：44引用：1難度：0.7
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