首页 > 英语四级

网友您好，请在下方输入框内输入要搜索的题目：

请输入或粘贴题目内容搜题

搜题

拍照、语音搜题，请扫码下载APP

题目内容（请给出正确答案）

[主观题]

Spaceflight is possible for individuals who want to fly in the space and who have the mone

A．Y

B．N

C．NG

答案

查看答案

发布时间：2020-10-23

更多“Spaceflight is possible for individuals who want to fly in the space and who have the mone”相关的问题

第1题

A．To increase their knowledge of other countries.B．To visit as many countries as possi

A．To increase their knowledge of other countries.

B．To visit as many countries as possible.

C．To appreciate the local food and wine.

D．To get a proper feel of a place.

点击查看答案

第2题

The passage tells us . A．the relationship between supply and demandB．the possi

The passage tells us .

A．the relationship between supply and demand

B．the possible results of government controls

C．the necessity of government control

D．the urgency of getting rid of government controls

点击查看答案

第3题

Compared with the modern Olympic Games, the ancient ones ____________A.covered every possi

Compared with the modern Olympic Games, the ancient ones ____________

A.covered every possible events for males

B.did not give due respect to women

C.attracted people from different countries

D.had more sports events than the modem ones

点击查看答案

第4题

To understand what true happiness is one must ________.A) have as much run as possi

To understand what true happiness is one must ________.

A) have as much run as possible during one’s lifetime

B) make every effort to liberate oneself from pain

C) put up with pain under all circumstances

D) be able to distinguish happiness from fun

点击查看答案

第5题

Rocket RenaissanceThe Ear of Private Spaceflight Is About to StartBackgroundTwo years ago,

Rocket Renaissance

The Ear of Private Spaceflight Is About to Start

Background

Two years ago, people witnessed the first space travel by SpaceShip One. Three people were involved in this flight: Burt Rutan, who designed the craft, and Mike Melvill, who flew it--although they were ably assisted by Paul Allen, one of the founders of Microsoft, who paid for it. Certainly, people have long been known that manned spaceflight was possible. What they showed was that it is not just a game for governments. Private individuals can play, too.

People involved

Now, lots of people want to join in, and most of them have just met up at the International Space Development Conference in Los Angeles, to engage in that mixture of camaraderie and competition that characterises the beginnings of a new technology. And, as might be expected, they have two of the necessary ingredients of success: ideas and money.

First, the money. So far, more than $1 billion is known to have been committed to building private spaceships and the infrastructure to support them. For example, Mr.. Rum' s follow-up vehicle, SpaceShip Two, is expected to cost its backers, Virgin Galactic, $240m for a fleet of five. The spaceport in New Mexico from which these are intended to fly will account for another $225m, although New Mexico's government is planning to raise this money itself.

These are not small sums, of course. On the other hand, Virgin Galactic has already banked $14m of deposits towards the $200,000 fare from people who want to travel on SpaceShip Two, even though it has yet to be built, let alone flown.

All this suggests that spaceflight, if not exactly entering the age of the common man, is at least entering the age of the moderately prosperous enthusiast. For entrepreneurs, it is no longer necessary to have billions of dollars to get into space; millions will now do. And for those who merely wish to travel there, and have enough money in their bank account, reality is favourable.

Get started

As with aircraft a century ago, a lot of designs are competing with each other, and there is no certainty about which will succeed. The initial goal is to build a "suborbital" vehicle. This will not have to develop the tremendous speed needed to go into orbit around the Earth. instead, it will travel briefly into space, offering a short thrilling ride out of the atmosphere, a few minutes of weightlessness, and a spectacular view of the planet from about 100kin. Four important criteria are how you take off, what fuel you use, what your craft is made of, and how you come back.

Most people's vision of a rocket launch is straight up from the ground. But, of the five vehicles most likely to be developed, two will actually be launched from the air. SpaceShip Two will be carded to high altitude by a purpose-built aircraft known as Eve before its rocket motor is ignited. And Explorer, a vehicle being designed by Space Adventures, will be launched from the top of a high-altitude Russian research plane called the M-55X, according to Eric Anderson, the firm's president and chief executive.

As Dennis Jenkins, a consultant engineer at NASA, America's space agency, points out, this is similar to using a two-stage rocket to get into space, with the aircraft acting as the first stage. However, a plane offers several advantages over a throw-away booster rocket. First, it can be used again. Second, it uses oxygen from the air, rather than having to carry its own oxidant, which saves weight. Third, it is lifted by wings. That means the atmosphere is an advantage, rather than a hindrance. All this means that the spacecraft itself can be lighter and cheaper.

Not everyone wants to run two vehicles, though. Jeff Greason, president of XCOR Aerospace, a firm based in Mojave, California, is developing a two-person, ground-launched suborbital rocketplane c

A．Y

B．N

C．NG

点击查看答案

第6题

Questions 下列各are based on the following passage. Space exploration has always been th

e province of dreamers: The human imagination readily soarswhere human ingenuity (创造力) struggles to follow. A Voyage to the Moon, often cited as the firstscience fiction story, was written by Cyrano de Bergerac in 1649. Cyrano was dead and buried for a goodthree centuries before the first manned rockets started to fly. In 1961, when President Kennedy declared that America would send a man to the moon by thedecades end, those words, too, had a dreamlike quality. They resonated (共鸣) with optimism and ambition in much the same way as the most famous dream speech of all, delivered by Martin Luther KingJr. two years later. By the end of the decade, both visions had yielded concrete results and transformedAmerican society. And yet in many ways the two dreams ended up at odds with each other.The fight forracial and economic equality is intensely pragmatic (讲求实用的) and immediate in its impact. The urgeto explore space is just the opposite, It is figuratively and literally otherworldly in its aims. When the dust settled, the space dreamers lost out. There was no grand follow-up to the Apollomissions. The technologically compromised space shuttle program has just come to an end, with nosuccessor. The perpetual argument is that funds are tight, that we have more pressing problems here onEarth. Amid the current concerns about the federal deficit, reaching toward the stars seems a dispensableluxury--as if saving one-thousandth of a single years budget would solve our problems. But human ingenuity struggles on. NASA is developing a series of robotic probes that will get the mostbang from a buck. They will serve as modern Magellans, mapping out the solar system for whateverexplorers follow, whether man or machine. On the flip side, companies like Virgin Galactic are plotting abottom-up assault on the space dream by making it a reality to the public. Private spaceflight could liewithin reach of rich civilians in a few years. Another decade or two and it could go mainstream. The space dreamers end up benefiting all of us--not just because of the way they expand human knowledge, or because of the spin-off technologies they produce, but because the two types of dreamsfeed off each other. Both Martin Luther King and John Kennedy appealed to the idea that humans cantranscend what were once considered inherent limitations. Today we face seeming challenges in energy,the environment, health care. Tomorrow we will transcend these as well, and the dreamers will deserve alot of the credit. The more evidence we collect that our species is capable of greatness, the more we willactually achieve it. The author mentions Cyrano de Bergerac in order to show that__________

A.imagination is the mother of invention

B.ingenuity is essential for science fiction writers

C.it takes patience for humans to realize their dreams

D.dreamers have always been interested in science fiction

点击查看答案

第7题

仔细阅读2："There's an old saying in the space world: amateurs talk about technology, professionals talk about insurance."

"There's an old saying in the space world: amateurs talk about technology, professionals talk about insurance." In an interview last year with The Economist, George Whitesides, chief executive of space-tourism firm Virgin Galactic, was placing his company in the latter category. But insurance will be cold comfort following the failure on October 31st of VSS Enterprise, resulting in the death of one pilot and the severe injury to another.

On top of the tragic loss of life, the accident in California will cast a long shadow over the future of space tourism, even before it has properly begun.

The notion of space tourism took hold in 2001 with a $20 million flight aboard a Russian spacecraft by Dennis Tito, a millionaire engineer with an adventurous streak. Just half a dozen holiday-makers have reached orbit since then, for similarly astronomical price tags. But more recently, companies have begun to plan more affordable "suborbital" flights-briefer ventures just to the edge of space's vast darkness. Virgin Galactic had, prior to this week's accident, seemed closest to starting regular flights. The company has already taken deposits from around 800 would be space tourists, including Stephen Hawking.

After being dogged by technical delays for years, Sir Richard Branson, Virgin Galactic's founder, had recently suggested that a SpaceShipTwo craft would carry its first paying customers as soon as February 2015. That now seems an impossible timeline. In July, a sister craft of the crashed spaceplane was reported to be about half-finished. The other half will have to wait, as authorities of America's Federal Aviation Administration (FAA) and National Transportation Safety Board work out what went wrong.

In the meantime, the entire space tourism industry will be on tenterhooks(坐立不安). The 2004 Commercial Space Launch Amendments Act, intended to encourage private space vehicles and services, prohibits the transportation secretary (and thereby the FAA) from regulating the design or operation of private spacecraft, unless they have resulted in a serious or fatal injury to crew or passengers. That means that the FAA could suspend Virgin Galactic's licence to fly. It could also insist on checking private manned spacecraft as thoroughly as it does commercial aircraft. While that may make subotbital travel safer, it would add significant cost and complexity to an emerging industry that has until now operated largely as the playground of billionaires and dreamy engineers.

How Virgin Galactic, regulators and the public respond to this most recent tragedy will determine whether and how soon private space travel can transcend that playground. There is no doubt that spaceflight entails risks, and to pioneer a new mode of travel is to free those risks, and to reduce them with the benefit of hard-won experience.

61.What is said about the failure of VSS Enterprise？

A.It may lead to the bankruptcy of Virgin Galactic.

B.It has a strong negative impact on space tourism.

C.It may discourage rich people from space travel.

D.It has aroused public attention to safety issues.

62.What do we learn about the space-tourism firm Virgin Galactic？

A.It has just built a craft for commercial flights.

B.It has sent half a dozen passengers into space.

C.It was about ready to start regular business.

D.It is the first to launch "suborbital” flights.

63.What is the purpose of the 2004 Commercial Space Launch Amendments Ace？(商业空间的发射修正案)

A.To ensure space travel safety.