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The bicycle is one of the simplest and most useful inventions in the world. What is the most surprising is that it was not invented earlier, although the great inventor Leonardo da Vinci had drawn pictures for bicycles and also for flying machines and some other things. Those things were not produced until long after he died.
A person riding a bicycle uses very little energy to make the bicycle move, and there is no pollution at all when you are riding. In Chengdu, a lot of people rode bicycles to work twenty years ago. But cars instead of them now. Even so in developed countries, most people do not travel to work by bicycle. It is not because the bicycles are expensive or people feel tired if they ride to work. It is because the number of cars on the roads is becoming larger. It certainly becomes more dangerous to ride a bicycle. As a result, more people put their bicycles away and go to work in their cars. And in this way, the traffic is very crowded when people go to work by car in the morning and go home after work, the situation is becoming worse and worse.
Perhaps the best way to make riding safer and more popular is to create paths only for bicycles, and to make it so difficult and expensive for drivers to take their cars into the city that they will go back to use their bicycles. There has been a special way for bicycles on the road in Chengdu now. I think more and more people will return to ride bicycles to go to work. The air of cities will be much fresher. The sky will be a lot bluer. The people will live much happier lives.
54. Who invented the bicycle?
A. Gergy Bush. B. Mark. C. Leonardo da Vinci. D. Harry Borty.
55. The traffic is very crowded ,it is because ____________________.
A. the roads are becoming larger B. a number of cars are on the roads
C. there are many bicycles on the roads D. lots of people are walking on the roads
56. Why don’t people today go to work by bicycle?
A. Because the bicycle is too expensive. B. Because it’s very tiring to ride a bicycle.
C. Because the people dislike bicycles. D. Because it’s very dangerous to ride a bicycle.
57. According to the passage, which of the following is TRUE?
① The bicycles were not produced until long before he died.
② A lot of people in Chengdu rode bicycles to work 20 years ago.
③ It’s not polluted for people to ride bicycles.
④ The people in Chengdu can’t go to work with a special way by bicycle now.
A. ① ② B. ② ③ C. ①② ③ D. ② ③ ④
查看习题详情和答案>>have enough money for a trip? Don't worry. Here are some useful suggestions.
Plan ahead: This is probably the most important preparation for traveling. Don't wait until the last minute
to plan your trip, or you will have to spend more on tickets. Write down how much you expect to spend on
food and hotels. Make a plan and you can save much in this way.
Find useful information: Travel books will offer information about the cheapest hotels and restaurants.
Also the Internet can help you save money. You can find some useful websites like www. Travelcity. com
and www. Economy travel, com.
Travel in groups: Find someone who is interested in visiting the same places. By traveling with others
you can share costs and experiences.
Go to a less-known place: Well-known places may be expensive and too crowded. You may want to
think over your trip and go to a less-known place. Smaller towns still have many interesting activities and
sights. You can learn about lots of local customs, too.
Pack necessary things: The most important things to take are not always clothes. Remember medicine
because you may get sick. Snacks are also necessary because they can save you much money when you
can not find a cheap restaurant. By planning carefully, you can not only enjoy traveling but also save lots
of money. You will remember your travel experiences all your life.
B. read travel books
C. search the Internet
B. 网站
C. 旅游指南
B. to go to the most famous places
C. to make friends with local people
B. clothes are always the most important things to take
C. it's necessary to take some snacks with you during the trip
B. where to spend your holidays
C. how to save money for your trip
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aren't real stars. They're satellites, a machine that has been sent into space and goes around the Earth, moon,
etc. And the biggest of all is the International Space Station (ISS).
The ISS is the biggest satellite because scientists want to live on it. They think that the best way to learn
more about space is to live there. The space shuttle Discovery has taken off from the Kennedy Space Center
in Cape Canaveral, Florida several times and carried a few groups of astronauts to the International Space
Station.
When the space station is finished, it will be like a city in space. People will stay and study there with many
of the things they have at home. Laboratories, living rooms and power stations are being built. The ISS is the
most expensive space program ever. Millions and millions of dollars are being spent on it every year.
Scientists hope that the ISS will be a stepping stone for future space exploration. "The ISS will help us
better understand the human body, explore (know more about) space and study the earth. It can help us make
life on the earth better," said Kathryn Clark, an ISS scientist.
Sixteen countries are in the program: The US, Russia, Canada, Japan, Brazil and 11 European countries.
China is not an ISS country, but it has helped with some of the experiments. In 2003, China sent some rice
up to the ISS to find out what space would do to it.
Twenty Chinese students talked directly to an astronaut (spaceman) in the International Space Station (ISS)
on radio in Nanjing, capital of east China's Jiangsu Province on Sunday, 2007. The 20 students, aged 10 to 19
from Shanghai, Guangzhou and Nanjing, began talking to Clayton C. Anderson, a 48-year-old American
astronaut at 18:50 p.m. at Nanjing No. 3 Middle School when the ISS was passing over Nanjing.
After it's finished, more than 90 percnt of the world's population will be able to see the space station. So
keep looking up, and maybe you'll see it get bigger and brighter.
B. some students from Nanjing have been to the ISS
C. China is one of the members in the ISS group
D. the ISS is still in the space but has stopped working
B. machines that go around the earth, the moon and some stars
C. buildings where electricity is produced to supply a large area
D. some countries which help send the ISS up into space
—Because they _______.
B. could talk with some Chinese school students
C. hoped to travel to Mars and Venus some day
D. wanted to live in space and do better research