首页
登录
职称英语
[originaltext] It’s always fun to write about research that you can actually
[originaltext] It’s always fun to write about research that you can actually
游客
2024-03-12
11
管理
问题
It’s always fun to write about research that you can actually try out for yourself. Try this: Take a photo and upload it to Facebook, then after a day or so, know what the URL link to the picture is and then delete it. Come back a month later and see if the link works. Chances are, it will. Facebook isn’t alone here. Researchers at Cambridge University have found that nearly half of the social networking sites don’t immediately delete pictures when a user request they be removed. In general, photo-centric websites like Phlica were found to be better at quickly removing deleted photos upon request. Why do deleted photos stick around so long? The problem relates to the way data is stored on large websites. While your personal computer only keeps one copy of a file, large-scale services, like Facebook, rely on what are called Content Delivery Networks to manage data and distribution. It’s a complex system wherein data is copied to multiple intermediate devices, usually to speed up access to files when millions of people are trying to access the service at the same time. But because changes aren’t reflected across the Content Delivery Networks immediately, ghost copies of files tend to linger for days or weeks. In the case of Facebook, the company says data may hang around until the URL link in question is reused, which is usually after a short period of time, though obviously that time can vary considerably.
Questions 13 to 15 are based on the passage you have just heard.
13. What does the speaker ask us to try out?
14. What accounts for the failure of some websites to remove photos immediately?
15. When will the unwanted data eventually disappear from Facebook according to the company?
选项
A、When the system is down.
B、When new links are set up.
C、When the URL is reused.
D、When the server is restarted.
答案
C
解析
听力篇章最后提及照片最终从网上消失的时间:根据 Facebook 公司的说法,信息可一直存储到这个链接再次使用之时。所以C)为正确答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3526362.html
相关试题推荐
[originaltext]Thetimeis9o’clockandthisisMarianSnowwiththenews.
[originaltext]Thetimeis9o’clockandthisisMarianSnowwiththenews.
[originaltext]It’salwaysfuntowriteaboutresearchthatyoucanactually
[originaltext]It’salwaysfuntowriteaboutresearchthatyoucanactually
[originaltext]Amongglobalwarming’smostfrighteningthreatsisthepredic
[originaltext]Amongglobalwarming’smostfrighteningthreatsisthepredic
[originaltext]FlorenceHayesisajournalistfortheGreenVilleJournal,t
[originaltext]ThereareroughlythreeNewYorks.Thereis,first,theNewY
[originaltext]ThereareroughlythreeNewYorks.Thereis,first,theNewY
[originaltext]ThereareroughlythreeNewYorks.Thereis,first,theNewY
随机试题
Fromchildhoodtooldage,wealluselanguageasameansofbroadcastingou
[originaltext]Howmightyoudragagoodwriter’sworkdowntothelowerlev
小巷虽然狭窄,却拉不住快乐蔓延的速度……随着城市里那些密集而冰冷的高楼大厦拔地而起,在拥堵的车流中,在污浊的空气里,人们的幸福正在一点点地破碎
Theplanwasespeciallysupportedbythose______(那些愿意有更多机会说英语的人).whowishedto
A.增加 B.减少 C.不变 D.无法判断
下列关于国有控股上市公司发行股份的相关规定正确的有()。 Ⅰ.国有控股股东应
各种运输方式内外部的各个方面的构成和联系,就是( )。 A.运输系统
江恩把()作为进行交易的最重要的因素。A:时间 B:交易量 C:趋势
作为BOT项目投资者,在建立和使用现金流量模型对项目的价值和风险作出定量的分析
单位工程完工后的的验收程序为( )。A.施工单位自检→提交工程竣工报告→总监理工
最新回复
(
0
)