【C3】A.continualB.stableC.constantD.hot
【C3】
A.continual
B.stable
C.constant
D.hot
【C3】
A.continual
B.stable
C.constant
D.hot
第2题
0 words. Children Must be Taught to Tell Right from Wrong Many of todays young people have a difficult time seeing any moral dimension to their actions. There are a number of reasons why thats true, but none more prominent than a failed system of education that eschews teaching children the traditional moral values that bind Americans together as a society and a culture. That failed approach, called "decision-making" , was introduced in schools 25 years ago. It tells children to decide for themselves what is right and what is wrong. It replaced "character education". Character education didnt ask children to reinvent the moral wheel; instead, it encouraged them to practice habits of courage, justice and self-control. In the 1940s, when a character education approach prevailed, teachers worried about students chewing gum; today they worry about robbery and rape. Decision-making curriculums pose thorny ethical dilemmas to students, leaving them with the impression that all morality is problematic and that all questions of right and wrong are in dispute. Youngsters are forced to question values and virtues theyve never acquired in the first place or upon which they have only a tenuous hold. The assumption behind this method is that students will arrive at good moral conclusions if only they are given the chance. But the actual result is moral confusion. For example, a recent national study of 1,700 sixth-to-ninth-graders revealed that a majority of boys considered rape to be acceptable under certain conditions. Astoundingly, many of the girls agreed. This kind of moral illiteracy is further encouraged by values-education programs that are little more than courses in self-esteem. These programs are based on the questionable assumption that a child who feels good about himself or herself wont want to do anything wrong. But it is just as reasonable to make an opposite assumption: namely, that a child who has uncritical self-regard will conclude that he or she cant do anything bad. Such naive self-acceptance results in large part from the non-directive, non-judgmental, as-long-as-you-feel-comfortable-with-your-choices mentality that has pervaded public education for the last two and one-half decades. Many of todays drug education, sex education and values-education courses are based on the same 1960s philosophy that helped fuel the explosion in teen drug use and sexual activity in the first place. Meanwhile, while educators are still fiddling with outdated "feel-good" approaches, New York, Washington, and Los Angeles are burning. Youngsters are leaving school believing that matters of right and wrong are always merely subjective. If you pass a stranger on the street and decide to murder him because you need money—if it feels right—you go with that feeling. Clearly, murder is not taught in our schools, but such a conclusion—just about any conclusion—can be reached and justified using the decision-making method. It is time to consign the fads of "decision-making" and "non-judgmentalism" to the ash heap of failed policies, and return to a proved method. Character education provides a much more realistic approach to moral formation. It is built on an understanding that we learn morality not by debating it but by practicing it.
第3题
口中的最简单同时也是最有效的工具。全国各地的筷子大小基本一样,而用材的种类则各有不同,选材包括竹子、木材、象牙、塑料、铝、银、金等。特长的竹筷通常为厨房用筷。过去人们用嵌有银器的木筷来测试是否有人在餐中下毒,因为银器碰到一些有毒物品会起变色反应。
第4题
st likely to agree?
A.Neutrino astronomy will supersede all present forms of astronomy.
B.Neutrino astronomy will be abandoned if the DUMAND project fails.
C.Neutrino astronomy can be expected to lead to major breakthroughs in astronomy.
D.Neutrino astronomy will disclose phenomena that will be more surprising than past discoveries.
第5题
The passage states that interactions between neutrinos and other matter are______.
A.rare
B.artificial
C.undetectable
D.unpredictable
第6题
According to the passage, the primary use of the apparatus would be to______.
A.increase the mass of a neutrino
B.interpret the information neutrinos carry with them
C.study the internal structure of a neutrino
D.detect the presence of cosmic neutrinos
第7题
the detection of photons—quanta of electromagnetic radiation. Yet mere is another form. of radiation that permeates the universe: neutrinos. With(as its name implies)no electric charge, and negligible mass, the neutrino interacts with other particles so rarely that a neutrino can cross the entire universe, even traversing substantial aggregations of matter, without being absorbed or even deflected. Neutrinos can thus escape from regions of space where light and other kinds of electromagnetic radiation are blocked by matter. Furthermore, neutrinos carry with them information about the site and circumstances of their production: therefore, the detection of cosmic neutrinos could provide new information about a wide variety of cosmic phenomena and about the history of the universe. But how can scientists detect a particle that interacts so infrequently with other matter? Twenty-five years passed between Paulis hypothesis that the neutrino existed and its actual detection: since then virtually all research with neutrinos has been with neutrinos created artificially in large particle accelerators and studied under neutrino microscopes. But a neutrino telescope, capable of detecting cosmic neutrinos, is difficult to construct. No apparatus can detect neutrinos unless it is extremely massive, because great mass is synonymous with huge numbers of nucleons(neutrons and protons), and the more massive the detector, the greater the probability of one of its nucleons reacting with a neutrino. In addition, the apparatus must be sufficiently shielded from the interfering effects of other particles. Fortunately, a group of astrophysicists has proposed a means of detecting cosmic neutrinos by harnessing the mass of the ocean. Named DUMAND, for Deep Underwater Muon and Neutrino Detector, the project calls for placing an array of light sensors at a depth of five kilometers under the ocean surface. The detecting medium is the seawater itself: when a neutrino interacts with a particle in an atom of seawater, the result is a cascade of electrically charged particles and a flash of light that can be detected by the sensors. The five kilometers of seawater above the sensors will shield them from the interfering effects of other high-energy particles raining down through the atmosphere. The strongest motivation for the DUMAND project is that it will exploit an important source of information about the universe. The extension of astronomy from visible light to radio waves to x-rays and gamma rays never failed to lead to the discovery of unusual objects such as radio galaxies, quasars, and pulsars. Each of these discoveries came as a surprise. Neutrino astronomy will doubtless bring its own share of surprises.
Which of the following titles best summarizes the passage as a whole?
A.At the Threshold of Neutrino Astronomy
B.Neutrinos and the History of the Universe
C.The Creation and Study of Neutrinos
D.The DUMAND System and How It Works
第8题
ice age occurred about 25, 000 years ago. II. Ice ages have lasted about 10, 000 years for at least the last several hundred thousand years. III. Ice ages have occurred about every 100, 000 years for at least the last several hundred thousand years.
A.I only
B.II only
C.III only
D.I , II and III
第9题
uld be the case?
A.The equipment used in Japanese automobile plants would be different from the equipment used in United States plants.
B.Japanese workers would be trained to do several different production jobs.
C.Culture would not have an influence on the productivity levels of workers.
D.The production levels of Japanese-run plants located in the United States would be equal to those of plants run by United States companies.
第10题
经学家的血液,融人了文法家的方方面面。目前以“语言学”之名从事的大多数工作纯粹是描述性的;语言学家试图不通过价值判断或尝试绘制出未来语言发展的方向就来澄清语言的本质。但是,有许多专业人士和业余爱好者也在制定语言规则,他们规定出专门标准让大家遵守。而规定语法学家(prescriptivist)可能是想勾画出他们猜想什么是所谓的“错误的用法”,描写语言学家(descriptivist)却试图找到这种用法的根源;他们可能仅仅把它描述为“特殊的”,或者可能想找到规定语法学家不喜欢的规律性。规定语法学家之所以不喜欢这些规律,要么是因为它们太新,要么是因为它们源自一种他们不认可的方言。20世纪下半叶,规定性语法的传统受到越来越激烈的批评,这可以从他们反对的调子越来越微弱得到证明,但规定性语法的传统还远远没有消亡。
为了保护您的账号安全,请在“上学吧”公众号进行验证,点击“官网服务”-“账号验证”后输入验证码“”完成验证,验证成功后方可继续查看答案!