题目内容
（请给出正确答案）
A、explain to
B、attribute to
C、describe to
D、take away from
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更多“Li Heng-li says that the only significance numbers have is what people ascribe to them. Choose the c…”相关的问题
A.on
B.in
C.off
D.to
A.car
B.course
C.champion
D.court
A.This way， please
B.Come here
C.Follow me
D.Move on
What time is it now？
A．3:50.
B．4:30.
C．5:30.
A、Come here!
B、This way, please.
C、Follow me!
D、Move on!
It's time to ______ now.
A．go to school
B．go to bed
C．play games
W: Yes, but he is proud of it. He says it is a part of his identity.
Q: What does the conversation tell us about Mr. Li？
(18)
A．His English is still poor after ten years in America.
B．He doesn't mind speaking English with an accent.
C．He doesn't like the way Americans speak.
D．He speaks English as if he were a native speaker.
Concrete is also a climate-change villain. It is made by mixing water with an aggregate, such as sand or gravel, and cement. Cement is usually made by heating limestone and clay to over 2,500 degrees F. The resulting chemical reaction, along with fuel burned to heat the kiln, produces between 7% and 10% of global carbon-dioxide emissions. “When we have to repeatedly regenerate these materials because they’re not durable, we release more emissions,” says Victor Li who has created a concrete suffused by synthetic fibers that make it stronger, more durable, and able to bend like a metal. Li’s creation does not require reinforcement, a property shared by other concretes that use chemical additives. Using less water makes concrete stronger, but until the development of plasticizers, it also made concrete sticky, dry, and hard to handle, says Christian Meyer, a civil engineering professor at Columbia University.
Making stronger concretes, says Li, allows less to be used, reducing waste and giving architects more freedom. “You can have such futuristic designs if you don’t have to put rebar in there, or structural beams,” says Van Oss. A more directly “green” c6nerete has been developed by the Australian company TecEeo. They add magnesium to their cement, forming a porous concrete that actually scrubs carbon dioxide from the air.
While experts agree that these new concrete will someday be widely used, the timetable is uncertain. Concrete companies are responsive to environmental concerns and are always looking to stretch the utility of their product, but the construction industry is slow to change. “When you start monkeying around with materials, the governing bodies, the building departments, are very cautious before they let you use an unproven material,” Meyer says. In the next few decades, says Van Oss, building codes will change, opening the way for innovative materials. But while new concretes may be stronger and more durable, they are also more expensive — and whether the tendency of developers and the public to focus on short-term rather than long-term costs will also change is another matter.
By saying “it was the concrete age”(Line 3, Para. 1), Van Oss means that
A．the traditional building material concrete is the only man-made miracle.
B．concrete is indispensable in the development of modern construction industry.
C．compared with other inventions, concrete is more practical and useful.
D．concrete, as a building material, can be mixed with any other materials.
A) attends
B) highlights
C) buy
D) invest
E) telecommunications
F) superhighway
G) assess
H) access
I) advantage
J) privacy
K) transformation
L) transmits
M) charge
N) disposal
O) potential
Mr. Li runs a small trade company in Sichuan Province. He used to be worried about the sales of his goods, but now he simply logs on to the Internet and(1)the information about his company to almost anywhere. He now has so many resources at his(2)than before. He has even started to(3)in foreign countries and make money almost anywhere.
The(4)revolution has certainly changed the way we look at the world. And, most importantly, it allows people to get equal(5)to the information. People in less developed areas of the world are taking(6)of the benefits as well. One person says, "I used to have a small farm, but now I am doing international business." This is just one of the many benefits of the information(7). There are, however, some(8)challenges we will have to face. For example, there is a great deal of concern over(9)in the Information Age. Mr. Li(10)this point. Hopefully, we can solve this problem in the near future.
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