题目内容
TEXT AAt the age of 16, Lee Hyuk Joon’s life is a living hell. The South Korean 10th grader gets up at 6 in the morning to go to school, and studies most of the day until returning home at 6 p. m. After dinner, it’s time to hit the books again—at one of Seoul’s many so-called cram schools. Lee gets back home at 1 in the morning, sleeps less than five hours, then repeats the routine—five days a week. It’s a grueling schedule, but Lee worries that it may not be good enough to get him into a top university. Some of his classmates study even harder.South Korea’s education system has long been highly competitive. But for Lee and the other 700,000 high-school sophomores in the country, high-school studies have gotten even more intense. That’s because South Korea has conceived a new college-entrance system, which will be implemented in 2008. This year’s 10th graders will be the first group evaluated by the new admissions standard, which places more emphasis on grades in the three years of high school and less on nationwide SAT-style and other selection tests, which have traditionally determined which students go to the elite colleges.The change was made mostly to reduce what the government says is a growing education gap in the country: wealthy students go to the best colleges and get the best jobs, keeping the children of poorer families on the social margins. The aim is to reduce the importance of costly tutors and cram schools, partly to help students enjoy a more normal high-school life. But the new system has had the opposite effect. Before, students didn’t worry too much about their grade-point averages; the big challenge was beating the standardized tests as high-school seniors. Now students are competing against one another over a three-year period, and every midterm and final test is crucial. Fretful parents are relying even more heavily on tutors and cram schools to help their children succeed.Parents and kids have sent thousands of angry online letters to the Education Ministry complaining that the new admissions standard is setting students against each other. "One can succeed only when others fail," as one parent said.Education experts say that South Korea’s public secondary-school system is foundering, while private education is thriving. According to critics, the country’s high schools are almost uniformly mediocre—the result of an egalitarian government education policy. With the number of elite schools strictly controlled by the government, even the brightest students typically have to settle for ordinary schools in their neighbourhoods, where the curriculum is centred on average students. To make up for the mediocrity, zealous parents send their kids to the expensive cram schools.Students in affluent southern Seoul neighbourhoods complain that the new system will hurt them the most. Nearly all Korean high schools will be weighted equally in the college-entrance process, and relatively weak students in provincial schools, who may not score well on standardized tests, often compile good grade-point averages.Some universities, particularly prestigious ones, openly complain that they cannot select the best students under the new system because it eliminates differences among high schools. They’ve asked for more discretion in picking students by giving more weight to such screening tools as essay writing or interviews.President Roh Moo Hyun doesn’t like how some colleges are trying to circumvent the new system. He recently criticized "greedy" universities that focus more on finding the best students than trying to "nurture good students". But amid the crossfire between the government and universities, the country’s 10th graders are feeling the stress. On online protest sites, some are calling themselves a "cursed generation" and "mice in a lab experiment". It all seems a touch melodramatic, but that’s the South Korean school system. According to the passage, there seems to be disagreement over the adoption of the new system between the following groups EXCEPT（）
查看答案
搜索结果不匹配？点我反馈
更多问题
小麦植株最上一片叶称为旗叶，它对小麦籽粒的产量起着决定性的作用。与这种功能关系最密切的结构特点是下面哪些( ) ①细胞排列紧密 ②细胞中叶绿体数目较多 ③细胞中线粒体较多 ④叶绿体中基粒内类囊体数目多 ⑤细胞中具有中心体
已知某植物的基因型是AaBbCc，三对基因分别位于三对同源染色体上。若对该植物进行花药离体培养，然后恢复其可育性，共得到N个植株，则其中aaBBcc的数目是( )
TEXT AAt the age of 16, Lee Hyuk Joon’s life is a living hell. The South Korean 10th grader gets up at 6 in the morning to go to school, and studies most of the day until returning home at 6 p. m. After dinner, it’s time to hit the books again—at one of Seoul’s many so-called cram schools. Lee gets back home at 1 in the morning, sleeps less than five hours, then repeats the routine—five days a week. It’s a grueling schedule, but Lee worries that it may not be good enough to get him into a top university. Some of his classmates study even harder.South Korea’s education system has long been highly competitive. But for Lee and the other 700,000 high-school sophomores in the country, high-school studies have gotten even more intense. That’s because South Korea has conceived a new college-entrance system, which will be implemented in 2008. This year’s 10th graders will be the first group evaluated by the new admissions standard, which places more emphasis on grades in the three years of high school and less on nationwide SAT-style and other selection tests, which have traditionally determined which students go to the elite colleges.The change was made mostly to reduce what the government says is a growing education gap in the country: wealthy students go to the best colleges and get the best jobs, keeping the children of poorer families on the social margins. The aim is to reduce the importance of costly tutors and cram schools, partly to help students enjoy a more normal high-school life. But the new system has had the opposite effect. Before, students didn’t worry too much about their grade-point averages; the big challenge was beating the standardized tests as high-school seniors. Now students are competing against one another over a three-year period, and every midterm and final test is crucial. Fretful parents are relying even more heavily on tutors and cram schools to help their children succeed.Parents and kids have sent thousands of angry online letters to the Education Ministry complaining that the new admissions standard is setting students against each other. "One can succeed only when others fail," as one parent said.Education experts say that South Korea’s public secondary-school system is foundering, while private education is thriving. According to critics, the country’s high schools are almost uniformly mediocre—the result of an egalitarian government education policy. With the number of elite schools strictly controlled by the government, even the brightest students typically have to settle for ordinary schools in their neighbourhoods, where the curriculum is centred on average students. To make up for the mediocrity, zealous parents send their kids to the expensive cram schools.Students in affluent southern Seoul neighbourhoods complain that the new system will hurt them the most. Nearly all Korean high schools will be weighted equally in the college-entrance process, and relatively weak students in provincial schools, who may not score well on standardized tests, often compile good grade-point averages.Some universities, particularly prestigious ones, openly complain that they cannot select the best students under the new system because it eliminates differences among high schools. They’ve asked for more discretion in picking students by giving more weight to such screening tools as essay writing or interviews.President Roh Moo Hyun doesn’t like how some colleges are trying to circumvent the new system. He recently criticized "greedy" universities that focus more on finding the best students than trying to "nurture good students". But amid the crossfire between the government and universities, the country’s 10th graders are feeling the stress. On online protest sites, some are calling themselves a "cursed generation" and "mice in a lab experiment". It all seems a touch melodramatic, but that’s the South Korean school system. According to critics, the popularity of private education is mainly the result of（）
在一段时间，各种媒体大量报道了有关疯牛病的消息，“疯牛病”已成为老幼皆知的名词。石老师通过图书馆、科学院和网络，收集了许多关于疯牛病和朊病毒的研究资料，他将在课堂上和同学们一起探讨这个问题。 “为什么国家要严格控制牛肉的进口这说明疯牛病有什么特点” “因为疯牛病会传染，它是一种传染病。”学生不假思索地回答。 “那么哪些病原体会导致传染病呢” 同学们和石老师一起回顾了以往所学到的传染病种类，归纳出病原体有寄生虫、细菌、真菌以及病毒等。石老师没有马上告诉同学们疯牛病的病原体是什么，而是提出了更具挑战性的问题。 “如果有一种原因不明的传染病，如何着手寻找它的病原体呢” 在此之前的生物课中，同学们曾讨论过分离病原体的步骤。石老师希望同学们能够将这一知识应用起来。果然，一个同学想到了解决问题的办法。 “从被感染的动物提取病原体，再用健康动物进行实验。” “很好!”石老师进一步追问：“现在我们要寻找疯牛病的病原体，应该从病牛的哪些部位提取病原体呢” 同学们纷纷提出了自己的看法，有的认为应该抽取血液，有的认为应该从肌肉中提取病原体。这时，石老师向同学们展示了描述疯牛病、疯羊病症状的资料。通过对资料的分析，同学们达成了共识：“疯牛病主要表现为神经系统遭到破坏，最好从神经组织中提取病原体。” 石老师告诉学生，科学家与同学们的选择是一致的。当抽取患病动物的脑组织或脊髓液注射到健康动物后，健康动物最终患病。 接下来，石老师让同学们讨论如何鉴别疯牛病病原体的性质。交流过程中，老师发现一组同学想到了用陶瓷纤维过滤器。在学习病毒的时候，同学们已经了解到陶瓷纤维过滤器可以滤去寄生虫、细菌等，但会让病毒和化合物通过。大家集中对这一方案讨论之后，石老师向同学们展示了科学家实际的实验结果。实验中，未滤过的神经组织和滤过液都可以使健康动物感染该病。石老师又提出了问题： “根据实验结果，我们可以对该病原体的性质和大小做出什么判断呢” “病原体可以通过陶瓷纤维过滤器，说明体积很小，应该是病毒。”一个学生肯定地说。 另一个学生补充说：“经过滤的液体不可能含有细菌、真菌或寄生虫的整体，所以一定是病毒。而且报纸上也说了，是朊病毒导致了疯牛病。” 石老师并不着急纠正同学们的说法，他让同学们考虑一下，能否根据这一项实验结果就断定是病毒会不会还有其他的可能如果你认为是病毒，能不能设计方案进一步证实你的想法 教室里出现了一段时间的沉默。终于，有一个小组的同学提出了他们的假设：“我们可以将滤过液中的病毒破坏，使之不能增殖。再用健康动物实验，如果动物不再患病，说明病原体就是病毒。” “你们准备怎样阻止病毒的增殖呢”石老师追问道。 “只要破坏病毒的DNA或RNA，病毒将不能复制。加热或用福尔马林处理过滤液可以使DNA或RNA变性。” 石老师高度赞扬了这一组同学的设计方案，然后出示了图片。“实际实验的结果是处理后的滤过液仍然具有感染性!这说明了什么” 同学们感到非常吃惊：“看来，实验结果否定了我们的假设。病原体不是病毒!” “病原体还存在于滤过液中，下一步，我们怎样去寻找它呢”石老师继续启发学生。 “滤过液中除了病毒，还有化合物，我们可以鉴定化合物的感染性。” “非常好!”石老师感到很满意，进一步提示：“化合物的种类有很多，我们可以从最基本的生物大分子着手，用什么可以破坏蛋白质、脂肪和淀粉呢” 这个问题对同学们来说很轻松，很快，同学们设计好了一组实验，用不同的酶分别检验这三种大分子化合物。石老师适时地展示出图片，并请同学们对实验结果进行分析。 “原来病原体是一种蛋白质。”同学们高兴地报告自己的结论。 至此，石老师总结：疯牛病的病原体是一种结构改变了的蛋白质，由于这种蛋白质能像病毒一样传播疾病，因而称为“朊病毒”。在石老师的指导下，同学们认识了朊病毒这种新的病原体，了解到朊病毒的蛋白质本质。下课前，石老师还向同学们提供了一些有关朊病毒研究的网址，鼓励有兴趣的同学通过查阅资料对朊病毒有更多的了解。 请根据以上案例，回答下列问题： 该案例中，学生在学习方式上最突出的特点是什么这种学习方式有何意义
微信支付 
支付宝支付