Google Fusion Tables是哪种可视化工具（)？

"To turn the tables" means ______.

A．to move the tables

B．to carry the tables away

C．to gain courage

D．to gain an advantage after having been at a disadvantage

In nuclear fusion, two nuclei come together and ______.

A．form. a new nucleus

B．both split

C．give off free neutrons

D．reduce energy

Destructive weapons can be obtained from ______.

A．nuclear fusion

B．nuclear fission

C．both nuclear fusion and nuclear fission

D．nuclear splitting

The restaurant can always find tables for its .

A) clients

B) regulars

C) visitors

D) representatives

A.VMware Player

B.VMware Station

C.VMware Fusion

D.Virtual Box

By "the tables have turned" (Lines 3～4, Para.2) the author implies that ______.

A．the Western leaders have turned self-centered

B．the Asian leaders have become advocates of free trade

C．the developed economies have turned less competitive

D．the developing economies have become more independent

ia State government, loves to turn the tables on those who don't think it's possible to be middle-class, conservative, educated and still be truly black．Once, during an abortion debate, a woman in the audience angrily told James she was so middle-class she didn't have a clue about real African American life．"If you understood what these women go through," the woman said, "you would realize that abortion is their only choice." James then asked the woman to consider a poor black mother on welfare．She already has four children and an alcoholic husband who has all but abandoned the family．Now she discovers another child is on the way．"How would you counsel that woman？" asked James. "Have an abortion," the woman responded．"That child would have a very poor quality of life." "I have a vested interest in your answer," James said．"The woman I described was my mother．I was the fifth of six children born into poverty．And, in case you're interested, the quality of my life is just fine!" "To mm the tables" means __. A．to move the tables B．to carry the tables away C．to gain courage D．to gain an advantage after having been at a disadvantage

most successful of industries, was Charles Babbage, a 19th-century British mathematician. Exasperated by errors in the mathematical tables that were widely used as calculation aids at the time, Babbage dreamed of building a mechanical engine that could produce flawless tables automatically. But his attempts to make such a machine in the 1920s failed, and the significance of his work was only rediscovered this century.

Next year, at last, the first set of printed tables should emerge from a calculating "difference engine" built to Babbage's design. Babbage will have been vindicated. But the realization of his dream will also underscore the extent to which he was a man born ahead of his time.

The effort to prove that Babbage's designs were logically and practically sound began in 1985, when a team of researchers at the Science Museum in London set out to build a difference engine in time for the 200th anniversary of Babbage's birth in 1992. The team, led by the museum's curator of computing, Doron Swade, constructed a monstrous device of bronze, iron and steel. It was 11 feet long, seven feet tall, weighed three tons, cost around $500 000 and took a year to piece together. And it worked perfectly, cranking out successive values of seventh-order polynomial equations to 31 significant figures. But it was incomplete. To save money, an entire section of the machine, the printer, was omitted.

To Babbage, the printer was a vital part of design. Even if the engine produced the correct answers, there was still the risk that a transcription or typesetting error would result in the finished mathematical tables being inaccurate. The only way to guarantee error-free tables was to automate the printing process as well. So his plans included specifications for a printer almost as complicated as the calculating engine itself, with adjustable margins, two separate fonts, and the ability to print in two, three or four columns.

In January, after years of searching for a sponsor for the printer, the Science Museum announced that a backer had been found. Nathan Myhrvold, the chief technology officer at Microsoft, agreed to pay for its construction (which is expected to cost $373,000 with one proviso: that the Science Museum team would build him an identical calculating engine and printer to decorate his new home on Lake Washington, near Seattle). Construction of the printer will begin—in full view of the public—at the Science Museum later this month. The full machine will be completed next year.

It is a nice irony that Babbage's plans should be realized only thanks to an infusion of cash from a man who got rich in the computer revolution that Babbage helped to foment. More striking still, even using 20th-century manufacturing technology the engine will have cost over $830 000 to build. Allowing for inflation, this is roughly a third of what it might have cost to build in Babbage's day-in contrast to the cost of electronic-computer technology, which halves in price every 18 months. That suggests that, even had Babbage succeeded, a Victorian computer revolution based on mechanical technology would not necessarily have followed.

Babbage wished to build a mechanical engine because______.

A．he was very disappointed at the mathematical tables available at the time

B．he wanted to be the first man to invent a computing machine

C．he intended to make the mathematical tables flawless

D．he thought he was doing a significant work

Part A

Directions: Read the following four texts. Answer the questions below each text by choosing A, B, C or D. (40 points)

Nuclear fission is the splitting of the nucleus of an atom. Only a few elements are suitable for use in this way, the most important ones being Uranium-235, Uranium-233, and Plutonium-239. When a nucleus of one of these elements is struck by a free neutron it breaks down into two lighter nuclei which fly apart at high speed, colliding with surrounding atoms. Their kinetic energy is converted into heat energy. At the same time, two or three free neutrons are released and one of them enters the nucleus of a neighbouring atom, causing fission to occur again; and so on. The reaction spreads very quickly, with more and more heat energy released. This is called a "chain" reaction because the splitting of each nucleus is linked to another, and another and another.

If this reaction takes place in an atomic bomb, where nothing is done to slow it down, the result is a violent explosion that can destroy a town in a few seconds. Fission can also, however, take place within a construction called a nuclear reactor, or atomic pile. Here the highly fissile material (U-235, U-233, Pu-239) is surrounded by a substance that is non-fissile, for instance graphite. This material is called a moderator. The neutrons lose some of their energy and speed through colliding with the atoms of the moderator. Energy—heat energy—is still created on an enormous scale, but no expansion takes place. The moderator has another function: by slowing down the speed of the free neutrons, it makes it more likely that one of them will collide with the nucleus of a neighbouring atom to continue the chain reaction.

The chief advantage of nuclear energy is that it does not depend on any local factors. A nuclear reactor, unlike an oil-well or a coalmine, does not have to be sited on top of a fossil-fuel source; unlike the solar energy unit, it does not have to go out of production when the sun is not shining; unlike hydro-electric power, it does not depend on a large flow of water which may be reduced during some seasons of the year. With an atomic power station, the only limiting factor is that of safety.

In the opposite process, nuclear fusion, two nuclei come together, to form. a new nucleus of a different kind and this process also releases energy on an enormous scale. Fusion can only occur under conditions of very great heat—at least 50,000,000 degrees Celsius. (The temperature at the centre of the sun is estimated as 130,000,000 degrees Celsius.) A fusion reaction on earth has already been created—the hydrogen bomb. This is an uncontrolled reaction. It is not yet possible to produce a controlled fusion reaction that can be used for the production of useful energy.

Nuclear energy can be thought of as a kind of square, three of the quarters of the square are known and used, but the fourth cannot yet be used.

Which of the following headings is that of Paragraph Two？

A．Nuclear Fusion

B．The Nuclear Fission Chain Reaction

C．Uncontrolled and Moderated Nuclear Reactions

D．The Advantages of Nuclear Energy

Google is eye-catching due to its ______.

A．distinctiveness

B．infiniteness

C．selfishness

D．aggressiveness