Calculations, which are astronomically exact, have been made    with the use of computers.

A．possible

B．it possible

C．possibly

D．to be possible

 

【答案】

A

【解析】略

 

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China’s Tianhe-1 has a computing speed of 2,507 trillion（萬億）calculations a second, making it the fastest computer in the world. It is also 40 percent faster than the world’s second fastest supercomputer, Cray XT5 Jaguar, in the US, kept at a national laboratory in Tennessee, according to the New York Times. Jack Dongarra, a University of Tennessee computer scientist, told NYT that the Chinese supercomputer is faster than the existing Number One machine.
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China’s new supercomputer will be used to speed up greatly scientific calculations, such as hurricane and tsunami modeling, cancer research, car design and even studying stars.
In 2008, two US scientists put together a step-by-step guide on how to build a supercomputer using PlayStation 3 video-game consoles（控制臺(tái)）. Modern supercomputers are built by combining thousands of small computer servers（服務(wù)器）and using software to turn them into one large computer. Really, any organization with enough material and technology can create a fast machine.
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“China is still a developing country,” said Sha Chaoqun, manager at Dawning Company which is the leading supercomputer maker in China. “Maybe one day, China’s total computing power can be greater than that of the US, but there is still a long way to go before we get there.”

Paragraph outline
Supporting details
China has developed the world’s fastest supercomputer.
◇Tianhe-1 has a high computing speed, which (1)__________ it the fastest computer in the world.
◇Tianhe-1 is 40 percent faster than the (2)__________ fastest supercomputer in the world.
◇(3)__________ Jack Dongarra, we learn that the Chinese supercomputer is faster than the existing Number One machine.
Many countries see the fastest supercomputer as a source of national (4)__________ and are making efforts to develop it.
◇The high-speed computer is (5)__________ to solve problems related to national interests.
◇Besides (6)__________, supercomputing technology can also be found in areas of defence, energy and science.
◇It’s obvious that top scientific talents are (7)__________ to research centers with large supercomputers.
The secret behind supercomputers is networking technology.
◇By using the technology built by Chinese people, taking it (8)__________ and devoting lots of time and money, China has achieved a lot.
Mr. Sha showed a conservative（保守的） (9)__________ toward the development of computing power.
◇(10)__________ the greater computing power China may have in the future, there is still a long way to go.

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