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1、题组2 科普知识,专题三 阅读理解 第三节 题组训练,A (2017河东区一模) Do you ever wish for a little more time to do everything you need to do？Well，on July 1 youll be getting itbut only one more second. On July 1 at exactly 7：59：59 a.m.Beijing time (or on June 30 at 23：59：59 UTC，Coordinated Universal Time)，the worlds atomic(原子的)
2、 clocks will pause for a single second，or，more precisely，change to the unusual time of 7：59：60，according to .The addition of a leap second(闰秒)，announced by the Paris Observatory，is to keep our clocks in time with the slowing of Earths rotation(旋转) and astronomical time as measured by the sun.,Just o
3、ne extra second could cause big problems and affect the way computers and websites work，however.When the last leap second was added back in 2012，more than a few websites had some trouble.As reported by Phys.org，popular sites like the community website Reddit crashed when the leap second was added. F
4、or Reddit，the problem was eventually found to be with a Linux system that got confused when it checked the network time and found an extra second.,Speaking to Wired about the problem back in 2012，Linux creator Linus Torvalds commented：“Almost every time we have a leap second，we find something.Its re
5、ally annoying，because its code(代码) that is almost never used，and thus not tested by users under their normal conditions.” Companies have had to think of their own solutions，and Googles “leap smear” may be the best-known example.As company engineer Christopher Pascoe explains in a blog post，companies
6、 usually try to fix the problem by turning back the clocks by one second at the end of the day so that they play that second again.,However，Pascoe believes this creates problems.He asked：“What happens？Does e-mail that comes in during that second get stored correctly？” Google has a solution：Cut the e
7、xtra second into milliseconds and then put these tiny amounts of time into the system throughout the day.“This means that when it became time to add an extra second at midnight，”says Pascoe.“Our clocks have already taken this into account over the course of the day.”,For many companies without Googl
8、es money，however，the leap second will likely still cause some crashes.Dont worry，thoughat least it wont last long!,语篇解读 本文主要介绍了“闰秒”带来的影响及其解决方案。,1.Why do we need to add a leap second? A.The worlds atomic clocks are set to do so. B.To keep in time with the worlds computers. C.To keep atomic clocks in
9、time with the slowing of Earths rotation. D.To record the changes to astronomical time.,解析 细节理解题。根据文章第二段中“The addition of a leap second(闰秒)，announced by the Paris Observatory，is to keep our clocks in time with the slowing of Earths rotation(旋转) and astronomical time as measured by the sun.”可知，闰秒是由于地
10、球自转变慢引起的，为了与由太阳测量的天文时间一致而增加一秒，故选C。,答案,解析,2,3,1,4,5,2.What happened to the website Reddit when the leap second was added in 2012? A.It crashed because of a virus attack. B.Its network time added two extra seconds. C.All of the code in its Linux system went wrong. D.One of its software systems got con
11、fused and the site broke down.,解析 细节理解题。根据第三段最后一句和第四段中“the problem was eventually found to be with a Linux system that got confused when it checked the network time and found an extra second”可知，闰秒发生时，网站崩溃，运行系统混乱，故选D。,答案,解析,2,3,1,4,5,解析 代词指代题。根据文章第五段中“we find something.Its really annoying，because its
12、 code(代码) that is almost never used，and thus not tested by users under their normal conditions”可知，something指代后文出现的一些从没使用过和测试过的代码，即代码不正常地工作，故选A。,3.What does the underlined word “something” refer to in the 5th paragraph? A.The code not working properly. B.The extra second. C.The problem. D.Normal cond
13、itions.,答案,解析,2,3,1,4,5,4.How do companies usually deal with the problem of the extra second? A.By shutting down computers at the end of the day. B.By stopping receiving emails that come in during that second. C.By turning the clocks back by one second at the end of the day. D.By cutting the extra s
14、econd into milliseconds throughout the day.,解析 细节理解题。根据第六段中“companies usually try to fix the problem by turning back the clocks by one second at the end of the day so that they play that second again”可知，解决额外一秒的做法是在一天结束时将时钟往回调一秒，故选C。,答案,解析,2,3,1,4,5,5.Whats Christopher Pascoes attitude toward Googles
15、 solution to the problem? A.Unfavorable. B.Doubtful. C.Approving. D.Cautious.,解析 推理判断题。根据倒数第二段中“This means that when it became time to add an extra second at midnight，says Pascoe.Our clocks have already taken this into account over the course of the day.”可知，午夜时分多一秒时，时钟已经在白天将这一秒考虑在内了，所以Pascoe认同这个方法，故
16、选C。,答案,解析,2,3,1,4,5,B (2017和平区一模) Soaping up your hands may do more than just get rid of germs.It may wash away the inner confusion you feel right after being forced to make a choice between two appealing choices，according to a new study.The study builds on past research into a phenomenon known as “the Macbeth effect”.,It turns out that Shakespeare was really onto something when he imagined Lady Macbeth trying to clean her conscience(良心) by rub
