题目内容

The moon appears to warp the minds of some men. Despite putting men on the moon in 1969 America seems determined on re-enacting the space race, this time pitting its efforts against those of the Chinese. Now a Russian company claims it could develop a system to exploit the moon’s natural resources and potentially relocate harmful industries there. This is lunacy. Russia certainly has great prowess in space. In its former guise as the centre of power in the Soviet Union it launched the first man-made satellite in 1957. In a spectacular follow up, Yuri Gagarin became the first person in space in 1961. Another triumph came in 1968 when the Russians sent a spaceship to orbit the moon with turtles aboard, returning it and its living cargo safely to Earth. An unmanned Russian spacecraft also landed on the moon ahead of the first manned landing by the Americans. Even after Neil Armstrong took his one small step, Russia has proved its superiority in keeping people in space stations orbiting the Earth. The Russian Soyuz rocket is a mainstay of satellite launches and would be used to rescue astronauts should any accident befall the International Space Station. Head of the spacecraft manufacturer that helped achieve these Russian successes, this week boasted that his rockets could be used to industrialise the moon. So why were his remarks greeted with such scepticism One reason for the cynicism is that the idea is absurd. A United Nations treaty passed in 1967 bans potentially harmful interference with the Earth’s original satellite and requires international consultation before proceeding with any activity that could disrupt the peaceful exploration of space, including the moon. A second problem is that landing on the moon has proved beyond the budget of any state other than America and of any private company to date. In fact one of the best hopes for investment comes from space tourism. On Saturday April 7th, the fifth such holidaymaker entered space aboard a Russian Soyuz rocket. Charles Simonyi, an American software developer, paid $25m for his ten-day stay at the International Space Station. The next holiday destination is the moon. The tour operator that organised the first five packages is offering two tickets to orbit the moon for $100m each. Launch would be aboard a Soyuz spacecraft. But the Soyuz system was designed in the 1960s and has been on the verge of retirement for many years. Unfortunately the Russian authorities have postponed indefinitely the development of a successor. Thus the claim of the industrialisation of the moon is unlikely to succeed. According to the text, which is the most probable result of the development of space tourism

A. It is mainly taken by US software developers such as Charles Simonyi.
B. It need the development of new rocket systems to replace the current one.
C. It brings to a new round of space race between US and China.
D. It witnesses the success of the industrialization of the moon.

查看答案
更多问题

One thing that distinguishes the online world from the real one is that it is very easy to find things. To find a copy of The Economist in print, one has to go to a newsstand, which may or may not carry it. Finding it online, though, is a different proposition. Just go to Google, type it in" economist" and you will be instantly directed to economist.com. (46) Indeed, until Google, now the world’s most popular search engine, came on to the scene in September 1998, searching online was a hit-or-miss affair.Google was vastly better than anything that had come before: so much better, in fact, that it changed the way many people use the web. (47) Almost overnight, it made the web far more useful, particularly for non-specialist users, many of whom regard Google as the Internet’s front door. It’s now a worldwide phenomenon. Not only has it made the Internet into an extremely fast and valuable research tool, it’s become a common word and has even created a new verb" to google." (48)The recent fuss over Google’s stock market flotation obscures its far wider social significance: few technologies, after all, are so influential that their names have become a household verb such as the cloning technology creates the verb" to clone".Google began in 1998 as an academic research project by Sergey Brin and Lawrence Page, who were then graduate students at Stanford University in Palo Alto, California. It was not the first search engine, of course. (49) Existing search engines were able to scan a large portion of the web, build an index, and then find pages that matched particular words, but were less good at presenting those pages, which might number in the hundreds of thousands, in a useful way.Mr. Brin’s and Mr. Page’s accomplishment was to devise a way to sort the results by determining which pages were likely to be most relevant. They did so by using a mathematical program, called PageRank. (50) This program is at the heart of Google’s success, distinguishing it from all search engines and accounting for its apparently magical ability to find the most useful web pages. With this powerful ability. Google distinguished itself from among all the search engines and became an established standing research tool in the online world. This program is at the heart of Google’s success, distinguishing it from all search engines and accounting for its apparently magical ability to find the most useful web pages.

一个事务成功完成后,它对数据库的改变必须是永久的。这一特性称为事务的甲 ______。

阅读梁实秋《谈时间》中的一段文字,然后回答下面小题。 时光不断在流转,任谁也不能攀住它停留片刻。“逝者如斯夫,不舍昼夜!”我们每天撕一张日历,日历越来越薄,快要撕完的时候便不免矍然以惊,惊的是又临岁晚,假使我们把几十册日历装为合订本,那便象征我们的全部的生命,我们一页一页地往下扯,该是什么样的滋味呢!“冬天一到,春天还会远吗?”可是你一共能看见几次冬尽春来呢? 这段文字主要用了何种论证方法?

颈椎压缩骨折或脱位较轻的病人行枕颌吊带牵引复位满意者,用头颈胸石膏外固定,固定时间约为

A. 1个月
B. 2个月
C. 3个月
D. 4个月
E. 5个月

答案查题题库