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Passage 1 The Touch-Screen Generation A) On a chilly day last spring, a few dozen developers of children’s apps ( 应用程序 ) for phones and tablets ( 平板电脑 ) gathered at an old beach resort in Monterey, California, to show off their games. The gathering was organized by Warren Buckleitner, a longtime reviewer of interactive children’s media. Buckleitner spent the breaks testing whether his own remote-control helicopter could reach the hall’s second story, while various children who had come with their parents looked up in awe ( 敬畏 ) and delight. But mostly they looked down, at the iPads and other tablets displayed around the hall like so many open boxes of candy. I walked around and talked with developers, and several quoted a famous saying of Maria Montessori’s, “The hands are the instruments of man’s intelligence.” B) What, really, would Maria Montessori have made of this scene? The 30 or so children here were not down at the shore poking ( 戳 ) their fingers in the sand or running them along mossy stones or picking seashells. Instead they were all inside, alone or in groups of two or three, their faces a few inches from a screen, their hands doing things Montessori surely did not imagine. C) In 2011, the American Academy of Pediatrics updated its policy on very young children and media. In 1999, the group had discouraged television viewing for children younger than 2, citing research on brain development that showed this age group’s critical need for “direct interactions with parents and other significant care givers.” The updated report began by acknowledging that things had changed significantly since then. In 2006, 90% of parents said that their children younger than 2 consumed some form of electronic media. Nevertheless, the group took largely the same approach it did in 1999, uniformly discouraging passive media use, on any type of screen, for these kids. (For older children, the academy noted, “high-quality programs” could have “educational benefits.”) The 2011 report mentioned “smart cell phone” and “new screen” technologies, but did not address interactive apps. Nor did it bring up the possibility that has likely occurred to those 90% of American parents that some good might come from those little swiping ( 在电子产品上刷 ) fingers. D) I had come to the developers’ conference partly because I hoped that this particular set of parents, enthusiastic as they were about interactive media, might help me out of this problem, that they might offer some guiding principle for American parents who are clearly never going to meet the academy’s ideals, and at some level do not want to. Perhaps this group would be able to express clearly some benefits of the new technology that the more cautious doctors weren’t ready to address. E) I fell into conversation with a woman who had helped develop Montessori Letter Sounds, an app that teaches preschoolers the Montessori methods of spelling. She was a former Montessori teacher and a mother of four. I myself have three children who are all fans of the touch screen. What games did her kids like to play, I asked, hoping for suggestions I could take home. “They don’t play all that much.” Really? Why not? “Because I don’t allow it. We have a rule of no screen time during the week, unless it’s clearly educational.” No screen time? None at all? That seems at the outer edge of restrictive, even by the standards of overcontrolling parents. “On the weekends, they can play. I give them a limit of half an hour and then stop. Enough.” F) Her answer so surprised me that I decided to ask some of the other developers who were also parents what their domestic ground rules for screen time were. One said only on airplanes and long car rides. Another said Wednesdays and weekends, for half an hour. The most permissive said half an hour a day, which was about my rule at home. At one point I sat with one of the biggest developers of e-book apps for kids, and his family. The small kid was starting to fuss in her high chair, so the mom stuck an iPad in front of her and played a short movie so everyone else could enjoy their lunch. When she saw me watching, she gave me the universal tense look of mothers who feel they are being judged. “At home,” she assured me, “I only let her watch movies in Spanish.” G) By their reactions, these parents made me understand the problem of our age: as technology becomes almost everywhere in our lives, American parents are becoming more, not less, distrustful of what it might be doing to their children. Technological ability has not, for parents, translated into comfort and ease. On the one hand, parents want their children to swim expertly in the digital stream that they will have to navigate ( 航行 ) all their lives; on the other hand, they fear that too much digital media, too early, will sink them. Parents end up treating tablets as precision surgical ( 外科的 ) instruments, devices that might perform miracles for their child’s IQ and help him win some great robotics competition — but only if they are used just so. Otherwise, their child could end up one of those sad, pale creatures who can’t make eye contact and has a girlfriend who lives only in the virtual world. H) Norman Rockwell, a 20th-century artist, never painted Boy Swiping Finger on Screen , and our own vision of a perfect childhood has never been adjusted to accommodate that now-common scene. Add to that our modern fear that every parenting decision may have lasting consequences — that every minute of enrichment lost or mindless entertainment indulged ( 放纵的 ) will add up to some permanent handicap ( 障碍 ) in the future—and you have deep guilt and confusion. To date, no body of research has proved that the iPad will make your preschooler smarter or teach her to speak Chinese, or alternatively that it will rust her nervous system—the device has been out for only three years, not much more than the time it takes some academics to find funding and gather research subjects. So what is a parent to do? 1. The author attended the conference, hoping to find some guiding principles for parenting in the electronic age. 2. American parents are becoming more doubtful about the benefits technology is said to bring to their children. 3. Some experts believe that human intelligence develops by the use of hands. 4. The author found a former Montessori teacher exercising strict control over her kids’ screen time. 5. Research shows interaction with people is key to babies’ brain development. 6. So far there has been no scientific proof of the educational benefits of iPads. 7. American parents worry that overuse of tablets will create problems with their kids’ interpersonal relationships. 8. The author expected developers of children’s apps to specify the benefits of the new technology. 9. The kids at the gathering were more fascinated by the iPads than by the helicopter. 10. The author permits her children to use the screen for at most half an hour a day.
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参考答案:
举一反三
【单选题】下列关于氨基酸密码的叙述哪一项是正确的
A.
由DNA链中相邻的三个核苷酸组成
B.
由mRNA上相邻的三个核苷酸组成
C.
由tRNA结构中相邻的三个核苷酸组成
D.
由rRNA中相邻的三个核苷酸组成
【判断题】查找错账的方法主要有个别检查法和全面检查法.其中个别检查法又可以分为差数法、倍数法和除九法三种
A.
正确
B.
错误
【单选题】下列关于氨基酸密码的叙述哪一项是正确的是
A.
由DNA相邻的三个核苷酸组成
B.
由tRNA相邻的三个核苷酸组成
C.
由mRNA相邻的三个核苷酸组成
D.
由rRNA相邻的三个核苷酸组成
E.
密码子是间隔的
【多选题】下列关于核酸的叙述哪一项是正确的 。
A.
碱基配对发生在嘌呤碱和嘧啶碱之间
B.
G-C之间由两个氢键形成
C.
DNA的两条多核苷酸链方向相反
D.
核苷酸之间通过3′,5′磷酸二酯键连接
【单选题】心理问题是亚健康的重要内容之一,处理不当会发展为心理障碍和心理疾病,而且心理问题又是诱发亚健康问题的重要因素。所以说,心理调节对于解决亚健康问题有非常重要、不可替代的作用。 作者接下来有可能要论述的是( )。
A.
心理调节的性质
B.
心理对亚健康的影响
C.
亚健康中的心理问
D.
如何进行心理调节
【单选题】下列关于氨基酸密码的叙述哪一项是正确的
A.
由 DNA 链中相邻的三个核苷酸组成
B.
由 tRNA 链中相邻的三个核苷酸组成
C.
由 mRNA 链中相邻的三个核苷酸组成
D.
由 rRNA 链中相邻的三个核苷酸组成
【多选题】下列关于核酸的叙述哪项是正确的 ? ( )
A.
碱基配对发生在嘧啶碱与嘌呤碱之间
B.
鸟嘌呤与胞嘧啶之间的联系是由两对氢键形成的
C.
DNA 的两条多核苷酸链方向相反 , 一条为 3'→5', 另一条 5'→3'
D.
DNA 双螺旋链中 , 氢键连接的碱基对形成一种近似平面的结构
E.
腺嘌呤与胸腺嘧啶之间的联系是由两对氢键形成的
【单选题】下列关于核酸的叙述哪一项是错误的
A.
碱基配对发生在嘧啶碱与嘌呤碱之间
B.
鸟嘌呤与胞嘧啶之间的联系是由两对氢键形成的
C.
DNA的两条多核苷酸链方向相反
D.
DNA螺旋中,氢键连接的碱基对形成一种近似平面的结构
E.
腺嘌呤与胸腺嘧啶之间的联系是由两对氢键形成的
【判断题】性心理有健康和不健康之分。()
A.
正确
B.
错误
【判断题】海森堡的测不准原理是由测量的不精确造成的。
A.
正确
B.
错误
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