阅读理解 Take any long piece of paper. Now glue the ends of the paper together
题型：同步题难度：来源：
Take a second long piece of paper. Twist the paper once and glue the ends together. Now you
have made a Mobius band. For people studying maths, this band is uncommon.
This strange band was first made in the 1800s by a German man named August Mobius. Mr. Mobius studied maths. He wanted to find a way to show how this band works with maths. Understand 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 Mobius band,
you can follow the line around all sides of the paper. In other words, the Mobius band must have only
one surface.
It is also very interesting to see what happens when you cut the band. If you cut the Mobius band in
half once down the line you drew, you do not get two Mobius 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 Mobius bands.
Try it!
B. A paper ring for people to wear.
C. A metal ring for music.
D. An interesting twisted ring.
B. Cut the two surfaces of the paper into one.
C. Draw a line in the middle of the paper.
D. Twist the paper once and glue the two ends.
B. Two long pieces of paper.
C. Two Mobius Bands.
D. One large twisted ring.
答案
举一反三
you don"t know where you will be when an earthquake happens, prepare some supplies for your home,
workplace, and car.
1. Water.
A person needs at least l/2 gallon of water daily just for drinking. Store at least l gallon of water per
person per day and be prepared for a 72-hour period. It is suggested that you buy bottled water. Keep
bottled water in its original container and do not open it until you need to use it. Also, do check the"use by" date.
2. Food.
It"s always a practical idea to keep a supply of non-per ishable (不易腐烂的) food on hand. Have an enough supply of canned food, powdered milk, dried fruits, non-salted nutsnd canned juices for at least 72 hours.
3. Flashlights (手电筒) and spare batteries.
Keep a flashlight beside your bed, at your place of work, and in your car. Do not use matches or candles after an earthquake until you are sure that no gas leaks. Prepare a battery-powered radio and
spare batteries Most telephones will be out of order, so radios will be your best source of informatin.
4. Clothes.
If you live in a cold place, you must think about warmth. You might not have heat after an earthquake. Think about your clothing and bedding supplies.
B. Because earthquakes take place without warning.
C. Because earthquakes usually take place in the neighborhood.
D. Because it"s people"s daily work to prepare the earthquakes.
B. You"d better use your own containers to keep water.
C. You"d better open the bottled water when you buy it.
D. You shouldn"t open the bottled water until you need it.
B. fresh vegetables
C. dried fruits
D. canned juices
B. a telephone is the most important prepared thing
C. flashlights but not matches are first used after earthquakes
D. clothes are used to protect your head
B. some hot water
C. some batteries
D. some flashlights
What would you do if a stranger gave you some medicine and said it would keep you thin or help
you do well on exam?Would you _1_ it?
Sometimes this takes place at some schools in the south.
2_ those strangers want to give the students is drugs. Drugs can be 3 _that changes the way your
mind or body works. Students at a Foreign Language School learn to keep themselves _4 by saying
"no".
From this month, students in other schools are also learning about drugs. "Because teenagers
don"t know much about drugs, they might want to try them," Mr. Zhang, the director of a certain Drug
Control Center, said.
A sixteen-year-old boy named Peng Fei was an excellent student 5 he tried
drugs. One day, some older boys told him it would be fun. After taking drugs only once, he found it
very 6 to stop. He began to spend all his time and money _7_ drugs. In the end. he started _8_
from school and stealing.
In China, drugs are becoming a bigger problem for teenagers. One _9
people in China were using illegal (不合法的)drugs last year and _10 _ of them were young people.
There were 10,000 drug users under 16. Students now begin to take trips to Rehabilitation Centers
(戒毒所) _11_ kids with problem.
A junior students, Wang Xin _12 when she visited a center in
Guangdong last term.
"I just wanted to cry when I 1_3 all the sad stories about drugs users. " She
said.
Here is a piece of good advice on _14 drugs: Never try them, _15 you are curious.
( )2. A. How
( )3. A. anything
( )4. A. safely
( )5. A. before
( )6. A. easy
( )7. A. with
( )8. A. escapes
( )9. A. million
( )10. A. none
( )11. A. visit
( )12. A. shocked
( )13. A. found
( )14. A. keep away
( )15. A. as long as
B. Why
B. nothing
B. safety
B. after
B. easily
B. in
B. escaping
B. million of
B. most
B. to talk about
B. was shocked
B. saw
B. keeping off
B. unless
C. What
C. everything
C. unsafe
C. as soon as
C. hard
C. for
C. escaped
C. millions of
C. each
C. to read
C. was shocking
C. heard
C. to keep off
C. but
D. When
D. things
D. safe
D. while
D. hardly
D. on
D. escape
D. million"s
D. few
D. interviewing
D. shock
D. wrote
D. keeping away
D. even if
|
the hair clip, I __4__ 
the belt, and I __5__ 
the key ring, I __7__ 
the scarf, I __8__ 
the watch, and I __9__ 