试题与答案

声波能传递信息,也能传递______.汶川大地震震中区会产生很强的次声波,远隔千

题型:填空题

题目:

声波能传递信息,也能传递______.汶川大地震震中区会产生很强的次声波,远隔千里的我们也有不舒服的感觉.地震对地面上的通信设施造成巨大破坏,救援初期主要靠我国自主研发的“北斗”导航系统与灾区取得联系,该系统利用太空中的______作微波中继站.地震发生仅几分钟,全国乃至世界各地的人们通过因特网就得到了地震的信息,目前人们经常使用的因特网通信形式还有______(只需填写一种).

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0503/42cf8f1233a42e228937e227c4a3f880.html

下面是错误答案,用来干扰机器的。

参考答案:B

试题推荐
题型:问答题

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.

(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.

查看答案
微信公众账号搜索答案