The capital intended to broaden the export base and ___________ efficiency gains from international trade was channeled instead into uneconomic import substitution.
A:secure B:extend C:defend D:possess
The capital intended to broaden the export base and ______ efficiency gains from international trade was channeled in stead of uneconomic import substitution.
A:secure B:extend C:defend D:possess
What do chicken pox, the common cold, the flu, and AIDS have in common They’re all disease caused by viruses, tiny microorganisms that can pass from person to person. It’s no wonder that when most people think about viruses, finding ways to steer clear of viruses is what’s on people’s minds.
Not everyone runs from the tiny disease carders, though. In Cambridge, Massachusetts, scientists have discovered that some viruses can be helpful in an unusual way. They are putting viruses to work, teaching them to build some of the world’s smallest rechargeable batteries.
Viruses and batteries may seem like an unusual pair, but they’re not so strange for engineer Angela Belcher, who first came up with the idea. At the Massachusetts Institute of Technology (MIT) in Cambridge, she and her collaborators bring together different areas of science in new ways. In the case of the virus-built batteries, the scientists combine what they know about biology, technology and production techniques.
Belcher’s team includes Paula Hammond, who helps put together the tiny batteries, and Yet-Ming Chiang, an expert on how to store energy in the form of a battery. "We’re working on things we traditionally don’t associate with nature." says Hammond.
Many batteries are already pretty small. You can hold A, C and D batteries in your hand. The coin-like batteries that power watches are often smaller than a penny. However, every year, new electronic devices like personal music players or cell phones get smaller than the year before. As these devices shrink, ordinary batteries won’t be small enough to fit inside.
The ideal battery will store a lot of energy in a small package. Right now, Belcher’s model battery, a metallic disk completely built by viruses, looks like a regular watch battery. But inside, its components are very small, so tiny you can only see them with a powerful microscope.
How small are these battery parts To get some idea of the size, pluck one hair from your head. Place your hair on a piece of white paper and try to see how wide your hair is pretty thin, right Although the width of each person’s hair is a bit different, you could probably fit about lots of these virus-built battery parts, side to side, across one hair. These micro-batteries may change the way we look at viruses.
A:Broaden. B:Spread. C:Extend. D:Expand.
I try to read more books to broaden my knowledge.
A:extend B:intend C:widen D:deepen
A:Broaden. B:Spread. C:Extend. D:Expan
Something Men Do Not Like to Do
Eric Brown hates shopping. "It’s just not enjoyable to me," said the 28-year-old. Chicago man who was carrying several shopping bags along the city’s main street, Michigan Avenue. "When I’m out (1) , I basically know what I want to get. I rush in. I buy it. I (2) ."
Common wisdom says that guys hate to shop. You can ask generations of men. But people who study shopping say that a number of social, cultural and economic factors are now (3) this "men-hate-to-shop" notion.
" (4) social class, ethnicity, age — men say they hate to shop," says Sharon Zukin, a City University of New York sociology professor. "Yet when you ask them deeper questions, it turns out that they (5) to shop. Men generally like to shop for (6) , music and hardware. But if you ask them about the shopping they do for books or music, they’ll say ’Well that’s not shopping. That’s (7) .’" In other words, what men and women call "buying things" and how they approach that task are (8) . Women will (9) through several 1,000-square-metre stores in search of the perfect party dress. Men will wander through 100 Internet sites in search of the (10) digital camcorder. Women see shopping as a social event. Men see it as a mission or a (11) to be won.
"Men are frequently shopping to win," says Mary Ann McGrath, a marketing professor at Loyola University of Chicago. "They want to get the best deal. They want to get the best one, The last one and if they do that it (12) them happy."
When women shop, "they’re doing it in a way where they want (13) to be very happy," says McGrath. "They’re kind of shopping for love."
In fact, it is in clothing where we see a male-female (14) most clearly. Why, grumble some men, are all male clothes navy, grey, black or brown But would they wear Light green and pink
"These days, many guys wear a sort of uniform", says Paco Underhill, author of Why We Bye, "It’s been hard for them to understand what it means to be fashion-conscious in a business way. It becomes much, much easier if you (15) your range of choices."
grumble n. 抱怨,发牢骚
ethnicity n. 种族特点
camcorder n. 摄像放像机
A:broaden B:expand C:extend D:narrow
A:broaden B:expand C:extend D:narrow
Floods have undermined the foundation of the ancient bridge.
A:destroyed B:reached C:broaden D:covered