共享单车

材料一：低效率的出行状况已经无法满足快节奏的城市生活，共享单车的出现，让很多城市的市民惊喜万分。共享单车代表了绿色出行的理念，解决了公共交通“最后一公里”的难题。因为固定地点停放的公共自行车没它方便，所以一夜之间，这种环保出行的方式就风靡了大街小巷。并且到达一定数量后，对于减轻雾霾、减轻拥堵，都有好处。

材料二：中国共享单车用户规模及预测

材料三：最近，关于共享单车的一篇公众号文章在朋友圈里转疯了。点开一看，简直闪瞎了眼睛：糟蹋单车居然有这么些花样！

    大致归纳，可分两类。一是损人利己型。给单车加上自己的锁，共享变私有了；重新喷漆装上儿童座，明目张胆侵占了；到地方顺手一扔，管它占不占道，方便潇洒了……

    还有一类，损人不利己型。这样的人就更可气了。到地方随手一放，可以，非得推倒干嘛？对你有啥好处？最可气的是，骑完往车座上插一根针！你损不损啊！你扎人家后头骑车的，对你又有什么好处呢？

材料四：共享单车要远离任人糟蹋的窘境，没有有效的约束和管理是不行的。一方面，企业有管理责任。比如说，单车乱停乱放，影响了交通和城市秩序，在经济学上有个外部性的概念，就是交易双方的活动，会对第三方、对社会造成影响。造成了负面影响，就是负外部性，企业就该负责，不能钱你赚了，烂摊子一点不沾，全推给社会了。其实，共享单车企业可以利用大数据，确定乱停乱放多发的路段地区，派出专人归置车辆，让车辆有序停放。同时，看到有人归置，对那些想搞破坏的人，也可以形成可见的震慑。另一方面，公共管理也要跟上。虽然财产犯罪达到一定的数额才能刑事追诉，但也不是说加锁霸占、拆卸车座是小打小闹，就可以逍遥法外了。《治安管理法处罚》对盗窃、故意损毁、强行占用公私财物早有科治之正条。用好行政拘留、罚款等行政处罚之外，更要加强对典型案例的宣传教育，才能让一小部分坏人明威畏法，起到社会预防之效。

小华外出旅游入住北京某酒店，看到服务总台的墙壁上有一排挂钟（如图）。她对造成不同时区时差的原因，解释正确的是（　　）

下列说法中正确的是（　　）

    Surfing the Internet for fun will make you a better employee, according to an Australian study.

    The University of Melbourne study shows that people who use the Internet for their own reasons at work are about 9 percent more productive(具有创造性的) than those who do not. Study author Brent Coker said, “Surfing the Internet at times helps increase workers' attention.”

    “People need to relax for a bit to get back their attention,” Coker said on the university's website. “Having a short break, such as a quick surfing of the Internet, helps the mind to rest itself, leading to a higher total Internet attention for a day's work, and as a result, increases productivity (生产效率),” he said.

    According to the study of 300 workers, 70 percent of people who use the Internet at work surf the Internet for their own reasons during office hours. Among the most popular surfing activities are searching for information about products, reading online news, playing online games and watching videos. “Firms spend a lot of money on software to block their workers from watching videos, using social networking sites or shopping online,” said Coker. “That's not always a good idea.”

    However, Coker said the study looked at people who surfed the Internet in moderation(适度), or were on the Internet for less than 20 percent of their total time in the office. “Those who spend too much time surfing the Internet will have a lower productivity than those without.” he said.