在使用InstallShield打包的“建立磁盘映像”步骤中，Build Type对话框的作用是（）。

A:选择磁盘映像的建立类型，有FullBuild和Quick Build两种选择 B:编译工程对象 C:设置打包分装后的磁盘映像文件的存放目录 D:设定公司名称和应用程序名称等信息

Success, it is often said, has many fathers--and one of the many fathers of computing, that 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.
Which of the following statements is Not true

A:Babbage’s difference engine turned out to be a large machine. B:Researchers did not build the printer for lack of money. C:Babbage designed the printer to avoid possible typesetting or transcription errors. D:Researchers found it difficult to build a printer as complicated as the calculating engin

Passage One
For millions of people, the American dream of owning a home seems to be slipping out of reach:
"Maybe young couples can no longer afford to buy a ready-made house as their parents did," says 40-year-old building instructor Pat Hennin. "But they can still have a home. Like their pioneer ancestors, they can build it themselves, and at less than half the cost of a ready-made house."
The owner-builders came from every occupational group, although surprisingly few are professional building workers. Many take the plunge with little or no experience. "I learned how to build my house from reading books." says John Brown, who built a six-room home for $25,000 in
High Falls, New Jersey. "If you have patience and the carpentry skill to make a bookcase, you can build a house."
An astonishing 50 percent of these owner-builders hammer every nail, lay every pipe, and wire every switch with their own hands. The rest contract for some parts of the task. But even those who just act as contractors and finish the insides of their homes can save from 30 percent to 45 percent of what a ready-made home would cost.
One survey revealed that 60 percent of owner-builders also design their homes. Many others buy commercial house plans for less than $100 or use plans available from the U.S. Department of Agriculture.

According to the passage, owner-builders are those who（）

A:are professional house builders B:build houses of their own C:are contract house builders D:sell or let houses

Passage One
For millions of people, the American dream of owning a home seems to be slipping out of reach:
"Maybe young couples can no longer afford to buy a ready-made house as their parents did," says 40-year-old building instructor Pat Hennin. "But they can still have a home. Like their pioneer ancestors, they can build it themselves, and at less than half the cost of a ready-made house."
The owner-builders came from every occupational group, although surprisingly few are professional building workers. Many take the plunge with little or no experience. "I learned how to build my house from reading books." says John Brown, who built a six-room home for $25,000 in
High Falls, New Jersey. "If you have patience and the carpentry skill to make a bookcase, you can build a house."
An astonishing 50 percent of these owner-builders hammer every nail, lay every pipe, and wire every switch with their own hands. The rest contract for some parts of the task. But even those who just act as contractors and finish the insides of their homes can save from 30 percent to 45 percent of what a ready-made home would cost.
One survey revealed that 60 percent of owner-builders also design their homes. Many others buy commercial house plans for less than $100 or use plans available from the U.S. Department of Agriculture.

It can be inferred from the passage that many Americans find it difficult to （）

A:build a house B:find a ready-made house C:have a good job D:buy a house

Passage One
For millions of people, the American dream of owning a home seems to be slipping out of reach:
"Maybe young couples can no longer afford to buy a ready-made house as their parents did," says 40-year-old building instructor Pat Hennin. "But they can still have a home. Like their pioneer ancestors, they can build it themselves, and at less than half the cost of a ready-made house."
The owner-builders came from every occupational group, although surprisingly few are professional building workers. Many take the plunge with little or no experience. "I learned how to build my house from reading books." says John Brown, who built a six-room home for $25,000 in
High Falls, New Jersey. "If you have patience and the carpentry skill to make a bookcase, you can build a house."
An astonishing 50 percent of these owner-builders hammer every nail, lay every pipe, and wire every switch with their own hands. The rest contract for some parts of the task. But even those who just act as contractors and finish the insides of their homes can save from 30 percent to 45 percent of what a ready-made home would cost.
One survey revealed that 60 percent of owner-builders also design their homes. Many others buy commercial house plans for less than $100 or use plans available from the U.S. Department of Agriculture.

The phrase "take the plunge" (Line 2, Para.3) most probably means（）

A:decide to build a house B:decide to pull down a house C:decide to buy a house D:decide to rent a house

Invisibility cloaks would have remained impossible, forever locked in science fiction, had it not been for the development of metamaterials. In Greek, "meta" means beyond, and metamaterials can do things beyond what we see in the natural world-like shuffle light waves around an object, and then bring’ them back together. If scientists ever manage to build a full-fledged invisibility cloak, it will probably be made of metamaterials.
"We are creating materials that don’t exist in nature, and that have a physical phenomenon that doesn’t exist in nature," says engineer Dentcho Genov. "That is the most exciting thing." Genov designs and builds metamaterials such as those used in cloaking at Louisiana Tech University in Ruston, Louisiana.
An invisibility cloak will probably not be the first major accomplishment to come from the field of metamaterials. Other applications are just as exciting. In many labs, for example, scientists are working on building a hyperlens. A lens is a device, usually made of glass that can change the direction of light waves. Lenses are used in microscopes and cameras to focus light, thus allowing a researcher to see small things or a photographer to capture image of things that are far away.
A hyperlens, however, would be made of metamaterials. And since metamaterials can do things with light that ordinary materials can’t, the hyperlens would be a powerful too 1. A hyperlens would allow researchers to see things at the smallest scale imaginable, as small as the wavelength of visible light.
Genov points out that the science of metamaterials is driven by the imagination. If someone can think of an idea for a new behavior for fight, then the engineers can find a way to design a device using metamaterials. "We need people who can imagine," he says.
Since 2006, many laboratories have been exploring other kinds of metamaterials that don’t involve just visible light. In fact, scientists are finding that almost any kind of wave may respond to metamaterials.
At the Polytechnic University of Valencia in Spain, Jose Sanchez-Dehesa is working with acoustics, or the science of sound. Just as an invisibility cloak shuffles waves of light, an "acoustic" cloak would shuffle waves of sound in a way that’s not found in nature. In an orchestra hall, for example, an acoustic cloak could redirect the sound waves so someone sitting behind a column would hear the same concert as the rest of the audience without distortion.
Sanchez-Dehesa, an engineer, recently showed that it’s possible to build such an acoustic cloak, though he doubts we’ll see one any time soon. "In principle, it is possible," he says, "but it might be impossible to make one." he adds.
Other scientists are looking into ways to use larger metamaterials as shields around islands or oil rigs as protection from tsunamis. A tsunami is a giant destructive wave. The metamaterial would redirect the tsunami around the rig or island, and the wave would resume its energy on the other side without causing any harm.
According to Sdnchez Dehesa, ______.

A:it is of great possibility to build an acoustic cloak soon. B:it is possible to build an acoustic cloak in theory but far from reality. C:it is totally impossible to build an acoustic cloak. D:it is theoretically impractical to build an acoustic cloak.

There is nothing in this world constant but inconstancy.--SWIFT Project after project designs a set of algorithms and then plunges into construction of customer-deliverable software on a schedule that demands delivery of the first thing built. In most projects, the first system built is (1) usable. It may be too slow, too big,awkward to use, or all three. There is no (2)   but to start again, smarting but smarter, and build a redesigned version in which these problems are solved. The discard and  (3) maybe done in one lump, or it may be done piece-by-piece. But all large-system experience shows that it will be done. Where a new system concept or new technology is used, one has to build a system to throw away, for even the best planning is not so omniscient（全知的）as to get it right the first time. The management question, therefore, is not whether to build a pilot system and throw it away. You will do that. The only question is whether to plan in advance to build a (4)  ,or to promise to deliver the throwaway to customers. Seen this way, the answer is much clearer. Delivering that throwaway to customers buys time, but it does so only at the (5)  of agony（极大痛苦）for the user, distraction for the builders while they do the redesign, and a bad reputation for the product that the best redesign will find hard to live down.. Hence plan to throw one away; you will, anyhow.

空白（3）处应选择（）

A:design B:redesign C:plan D:build