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Human beings havealways had an ability to attend to several things at once. Nor is electronic multitasking entirely new:We’ve been driving while listening to car radios since they became popular inthe 1930s. but there is no doubt that multitasking has reached a kind of warpspeed in the era of Web-enabled computers, when it has become routine toconduct several IM( 及时通讯 )conversations, watch TV and use the computer all at once 。 But what ’ s the impact of this media consumption? And how are thesemultitasking devices changing how kids learn, reason and communicate with oneanother ?Social scientists and educators are just beginning to deal with thesequestions, but the researchers already have some strong opinions 。 Although multitasking kids may be better prepared in some ways fortoday ’ s fast-paced work placed, Many scientists are positively alarmed bythe trend 。 Kids that are instant messaging while doing homework, playing gamesonline and watching TV, aren ’ t going to do well in the long run 。 On the positive side, multitasking students tend to beextraordinarily good at finding and using information. And probably becausemodern childhood centers around visual( 视觉的 )rather than printmedia, they are especially skilled at analyzing visual data and images 。 Many educators and psychologists say parents need to actively ensurethat their teenagers break free of uncontrollable engagement with screens andspend time in the physical company of human beings — a growingchallenge not just because technology offers such a handy option but because somany teenagers and college students say overcommitted( 任务过量的 )schedulesdrives much of their multitasking 。 Just as important is for parents and educator to teach kids that it ’ s valuable,even essential, to occasionally slow down, unplugs and take time to enjoy life beyondthe screen 。 21. What is the main idea of this passage? A. How is multitasking define ( 定义 )in the informationage? B. How do people see new technology and the social change it bringsabout? C. How does technology change modern family life? D. What ’ s the impact of multitasking on young people? 22. The expression “ warp speed ” in the first paragraph is closest in meaning to____ 。 A. Low speed B. Too much time alone 。 C. high speed D. steady speed 23. According to some teenagers and college students ,what causestheir multitasking? A. Overcommitted schedules B. Too much time alone C. Inability to focus D. Fear of being neglected 24. According to the passage, which of the following statement isTRUE? A. Humans have begun to engage in the multitasking behaviors sincethe information age 。 B. Multitasking is a critical skill that students are required tolearn at school 。 C. Only parents can help their kids to get rid of the multitaskinghabits 。 D. multitasking may prepare students for the reality of today ’ s fast-paceswork environment 。 25. What do educators and psychologist advise parents to do theirmultitasking kids? A. To cut off home internet connection 。 B. To seek medical treatment 。 C. To encourage their kids to have some social life 。 D. to helptheir kids to set personal goals 6 、 The reflectivetowers of New York City , which is on the Atlantic migrating( 迁徙的 )route , can bedeadly for birds. “ We live in an age of glass ,” said Ms.Laurel , anarchitect. “ It can be a perfect mirror in certain lights , and thelarger the glass , the more dangerous it is. ” About 90 , 000 birdsare killed by flying into building in the city each year. Often , they strikethe lower levels of glass towers after searching for food in nearby parks. Suchcrashes are the second-leading cause of death for migrating birds , afterhabitat( 栖息地 )loss , with an estimated number of death ranging up to a billion a year. As glass office and apartment towers have increased in the lastdecade , so , too , have calls to make them less deadly to birds. San Francisco adoptedbird-safety standard for new building in July. The United States Green BuildingCouncil , a nonprofit industry group that encourages the creation ofenvironmentally conscious buildings , will introduce abird-safety credit this as part of its environmental certification process. There are no easy fixes , however. A fewresearchers are exploring glass designs that use ultraviolet( 紫外线的 )signals , but they arestill in their infancy. Covers , dot patterns , shades and net are the main options available. Often , onlly one section of a building needs to be changed. “ You don ‘ tnecessarily have to treat every window ,” Ms.Laurel said. “ It would betoo expensive to do the whole building. ” The JacobConvention Center , which has been undergoing alterations , the most recent buildingto voluntarily correct the problem of bird crashes. The architects used lessreflective glass and dot patterns. 26. What is the main idea of the passage? A. New York is a city of glass towers. B. Glass tower are dangerous for migrating birds. C. New York adopted new safety standards for buildings. D. Glass towers are a new trend in the United States. 27. What is the number one cause of death for migrating birds? A. Climate change B. Habitat loss C. Lack of food D. Crashing into buildings. 28. What does the word “ fixes ” in thethird paragraph probably mean? A. Choices B. Explanations C. Solutions D. Developments 29. _____are used in the alteration of the Jacob K. JavitsConvention Center. A. Dot patterns B. Shades C. Nets D. Covers 30. Which of the fowling statements is TRUE according to thepassage? A. In many cases , the whole building needs to be altered to prevent bird crashes. B. The Jacob K.Javits Convention Center is the first building todeal with the problem of bird crashes. C. About 90 , 000 birds are killed due to habitat loss in New York City each year. D. Unfortunately , glass designs that use ultraviolet signals are still in their earlystages.
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【单选题】四大考验不包括?
A.
执政考研
B.
改革开放考研
C.
市场经济考研
D.
外部考研
【简答题】在四级考试中,听力部分所有试题均为选择题,但在本练习中,请同学们以填空形式完成(大写字母)
【单选题】以下哪个参数不属于主参数Emitter(发射器)里面的内容?
A.
Particle/sec
B.
Velocity
C.
Emitter type
D.
Gravity
【单选题】关于胃黏膜上皮的描述,下列哪一项是错误的?( )
A.
为单层柱状上皮
B.
含少量杯状细胞
C.
HE染色时细胞顶部胞质着色较浅
D.
上皮细胞能分泌黏液,并有保护作用
E.
上皮细胞的更新速度较快
【单选题】以下哪个参数不属于主参数Particle(粒子)里面的内容?
A.
Size
B.
Air
C.
Opacity
D.
Color
【多选题】关于抗原性质的叙述,下列说法不正确的有: ( )
A.
异物性是构成抗原的首要条件,自身成分不会成为抗原
B.
抗原进入机体,刺激机体产生免疫应答,应答都具有记忆性
C.
化学组成、结构、立体构象、物理性状等都会影响其免疫原性
D.
大分子物质必定免疫原性强
E.
糖分子通常具有较好的免疫原性
【单选题】下述关于胃肠激素的描述,哪一项是错误的( )。
A.
由散在于黏膜层的内分泌细胞分泌
B.
有些胃肠激素具有营养功能
C.
仪存在于胃肠道
D.
可调节消化道的运动和消化腺的分泌
E.
以上都不是
【判断题】农业社会主义改造大体上经历了互助组、初级社、高级社三个发展阶段。
A.
正确
B.
错误
【单选题】关于托收的特点说法错误的是( )
A.
托收属顺汇
B.
托收属商业信用
C.
承兑交单方式下,卖方资金负担较重,几乎需要提供整个交易过程需要的全部资金,承担钱货两空的风险、买方不付款的风险或买方延迟付款的利息损失
D.
托收的买方基本上没有资金压力,并且在整个交易中占据主动地位
【简答题】目前无线传感器网络的大部分应用集中在简单、低复杂度的信息获取上,只能获取( )。
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