高一英语阅读理解分类训练（智力、游戏类）
智力类
Take an any long piece of paper. Now glue(粘) the ends of the paper together. You have made a ring.
Take a second long piece of paper. Twist(扭转) the paper once and glue the ends together. Now you have made a Moby’s band(带子). For people studying maths, this band is uncommon.
This strange band was first made in the 1800s by a German named August Moby’s. Mr. Moby’s studied maths. He wanted to find a way to show how this band works with maths. Believe it or not, this band has only one surface. You can find this out for yourself.
If you draw a line on the surface of the paper before you twist and glue it, the line is only on one side of the paper. The paper has two surfaces. However, if you draw a line after you make the Moby’s band, you can follow the line around all sides of the paper. In other words, the Moby’s band must have only one surface.
It is also very interesting to see what happens when you cut the band. If you cut the Moby’s band in half once down the line you drew, you do not get two Moby’s bands. Instead, after you cut the band, it turns into one large twisted ring. Then, if you cut this ring in half along the middle of the band again, you get two connected Moby’s bands.
Try it!
1. What is a Moby’s band?
A. A long piece of paper. B. A paper rings for people to wear.
C. A metal ring for music. D. An interesting twisted ring.
2. Why did August Moby’s make this ring?
A. To help study a maths problem.
B. To show it’s the same as others.
C. To show the only surface of any band.
D. To find out how many sides it has.
