题目内容
Car companies are developing vehicles that will plug into electric sockets,just like many laptops,digital cameras,cell phones and Mp4 do.Called“plug-in vehicles”,these cars will get most of their power from electricity. Their drivers won't have to stop at gas stations as often as usual.
The technology is more than just cool. In our car-filled world,plug-in vehicles could reduce the amount of gas we use,which keeps rising in cost now and then. Besides,driving around in these vehicles may even help the environment.Gas-burning cars produce a lot of greenhouse gas,which causes globe warming.
The first company-produced plug-in vehicles could hit the roads by 2010. But engineers still have a lot of work to do to make the technology practical and inexpensive.
Batteries(电池) are the biggest challenge. In the plug-in-vehicle world,Li-ion(锂离子)batteries are getting the most attention.These batteries can store a large amount of energy in a small package,and they last a longer time between charges.Li-ion batteries can fit laptops,cell phones,heart instruments and other similar pocket ones.
But because cars are so big and heavy, it would still require a suitcase-sized Li-ion batteries to power about 12km of driving.What's more,the batteries are much expensive.
“A car filled with batteries could go a long distance,”says Ted Bohn, an electrical engineer in Chicago.“But it couldn't pull any people.and it would cost $100,000.”
So researchers need to work out how to make batteries smaller and cheaper,among other questions.
“The answers don't exist yet,”Bohn says,“As a kid,I thought someone someplace knows the answer to everything.All of these questions haven't been decided.That's what engineering is about-making a guess,running tests and getting fine results.”
72.The passage mainly talks about of a new car
A.the developing B.the speed C.the appearance D.the batteries
72.Which is true according to the passage?
A.The“plug-in vehicles”will use electricity completely as driving power.
B.The new technology will help protect our environment.
C.The technology of using electricity as driving is quite practical now.
D.The biggest challenge of the new technology is that it will cost us more energy.
74.How does Bohn feel about the future of the technology according to the last paragraph?
A.Confident B.Puzzled. C.Worried. D.Disappointed.
75.According to the passage,the new technology is facing the following problems except that .
A.the new technology cannot come into use at present
B.the cost of the new technology is quite high
C.the government won't support the technology
D. the size of the batteries is too big at present
【小题1】D
【小题2】B
【小题3】A
【小题4】C
解析
It’s Friday morning in the year 2030, and you’re running late. You got carried away watching the music video that was playing in the corner of your bathroom mirror while you were brushing your teeth. How will you get to your office at Mega Giga Industries on time?
A quick check of your Internet–connected refrigerator tells you your train is a bit behind schedule, too. So you decide to drive your environmentally–friendly fuel cell car instead—or rather, let your car drive you. It’s programmed to know the way and it will get you there without speeding, getting lost, or crashing.
Settling into your office chair, which changes color to match what you’re wearing, you pick up yesterday morning’s newspaper. Printed on reusable electronic paper, it immediately rewrites itself with today’s headlines. Now it’s time for your big meeting. Uh-oh! You’ve left your handwritten notes at home. No problem. The digital ink pen you used has stored an electronic copy of what you wrote.
Your wristwatch videophone (可视电话) suddenly rings. Your best friend’s face pops up on the screen (屏幕) asking what you’re doing this weekend. Will you play virtual soccer with the U.S. Olympic team? No, no. Your friend says, so you have to take the new elevator (made of microscopic fibers many times stronger than steel) 60000 miles into space.
Could this scene really take place in just twenty years? The researchers who are now developing all this stuff think so. These gadgets (小器械) may be as common in 20 years as cell phones and DVD players are today.
What is the BEST TITLE for the passage?
A. Life in the Future | B. Future Transportation |
C. Life Today and Tomorrow | D. Development of the Internet |
Your future car has all of the following features (特点) EXCEPT .
A. being programmed to know the way | B. using environmentally-friendly fuel |
C. driving you to different places safely | D. having an Internet-connected refrigerator |
How many high-tech products are mentioned in Paragraph 3?
A. Two. | B. Three. | C. Four. | D. Five. |
We can learn from the passage that in twenty years .
A. going to space may be common
B. DVD players will be much more popular
C. playing virtual soccer with Olympic teams won’t be attractive
D. wristwatch videophones will completely take the place of cell phones