单选题______ is she in London than she rings up her old friend Mary.

单选题The survey asked 750 school children about the values and beliefs they ______ from television. A. pick up B. take up C. put up D. make up

单选题Our teacher asked us to do a ______ writing after class.

单选题Theory is based on practice and______ serves and guides practice.

单选题Judy：Are you free this evening?Jack： ___56___?Judy：Shall we go and see a movie?Jack：I love movies，but ___57___ at the moment.What about going to a concert?Judy：Sure，Id love to， ___58___?Jack：Here

单选题 Trying too Hard Can Slow New Language Development A. Neuroscientists have long observed that learning a language presents a different set of opportunities and challenges for adults and children. B. Adults easily grasp the vocabulary needed to navigate a grocery store or order food in a restaurant, but children have an innate ability to pick up on subtle nuances of language that often elude adults. For example, within months of living in a foreign country, a young child may speak a second language like a native speaker. C. Experts believe that brain structure plays an important role in this 'sensitive period' for learning language, which is believed to end around adolescence. The young brain is equipped with neural circuits that can analyze sounds and build a coherent set of rules for constructing words and sentences out of those sounds. Once these language structures are established, it's difficult to build another one for a new language. D. In a new study, a team of neuroscientists and psychologists from Massachusetts Institute of Technology (MIT) discovered another factor that contributes to adults' language difficulties: When learning certain elements of language, adults' more highly developed cognitive skills actually get in the way. E. The researchers discovered that the harder adults tried to learn an artificial language, the worse they were at deciphering the language's morphology—the structure and deployment of linguistic units such as root words, suffixes, and prefixes. F. 'We found that effort helps you in most situations, for things like figuring out what the units of language that you need to know are, and basic ordering of elements. But when trying to learn morphology, at least in this artificial language we created, it's actually worse when you try,' said Amy Flynn a postdoc at MIT's McGovern Institute for Brain Research. G. Finn and colleagues from the University of California at Santa Barbara, Stanford University, and the University of British Columbia describe their findings in journal PLOS ONE. H. Linguists have known for decades that children are skilled at absorbing certain tricky elements of language, such as irregular past participles (examples of which, in English, include 'gone' and 'been') or complicated verb tenses like the subjunctive. 'Children will ultimately perform better than adults in terms of their command of the grammar and the structural components of language—some of the more idiosyncratic, difficult-to-articulate aspects of language that even most native speakers don't have conscious awareness of,' Finn says. I. In 1990, linguist Elissa Newport hypothesized that adults have trouble learning those nuances because they try to analyze too much information at once. Adults have a much more highly developed prefrontal cortex than children, and they tend to throw all of that brainpower at learning a second language. J. This high-powered processing may actually interfere with certain elements of learning language. 'It's an idea that's been around for a long time, but there hasn't been any data that experimentally show that it's true,' Finn says. Finn and her colleagues designed an experiment to test whether exerting more effort would help or hinder success. The study K. First, they created nine nonsense words, each with two syllables. Each word fell into one of three categories (A, B, and C), defined by the order of consonant and vowel sounds. Study subjects listened to the artificial language for about 10 minutes. One group of subjects was told not to overanalyze what they heard, but not to tune it out either. L. To help them not overthink the language, they were given the option of completing a puzzle or colouring while they listened. The other group was told to try to identify the words they were hearing. Each group heard the same recording, which was a series of three-word sequences—first a word from category A, then one from category B, then category C—with no pauses between words. M. Previous studies have shown that adults, babies, and even monkeys can parse this kind of information into word units, a task known as word segmentation. Subjects from both groups were successful at word segmentation, although the group that tried harder performed a little better. Both groups also performed well in a task called word ordering, which required subjects to choose between a correct word sequence (ABC) and an incorrect sequence (such as ACB) of words they had previously heard. N. The final test measured skill in identifying the language's morphology. The researchers played a three-word sequence that included a word the subjects had not heard before, but which fit into one of the three categories. O. When asked to judge whether this new word was in the correct location, the subjects who had been asked to pay closer attention to the original word stream performed much worse than those who had listened more passively. The findings support a theory of language acquisition that suggests that some parts of language are learned through procedural memory, while others are learned through declarative memory. P. Under this theory, declarative memory, which stores knowledge and facts, would be more useful for learning vocabulary and certain rules of grammar. Procedural memory, which guides tasks we perform without conscious awareness of how we learned them, would be more useful for learning subtle rules related to language morphology. Q. 'It's likely to be the procedural memory system that's really important for learning these difficult morphological aspects of language. In fact, when you use the declarative memory system, it doesn't help you, it harms you,' Finn says. Still unresolved is the question of whether adults can overcome this language-learning obstacle. Finn says she does not have a good answer yet but she is now testing the effects of 'turning off' the adult prefrontal cortex using a technique called transcranial magnetic stimulation. R. Other interventions she plans to study include distracting the prefrontal cortex by forcing it to perform other tasks while language is heard, and treating subjects with drugs that impair activity in that brain region.

单选题Mum, I"ve been studying English since 8 o"clock. ______ I go out and play with Tom for a while?

单选题The constitutional guarantee of free speech may have been aimed at protecting native speakers of English from censorship, but it is not a great ______ to interpret it as protecting the right to express oneself in any natural language or dialect.

单选题It is required that during the process, great care has to be taken to protect the ______silk from damage.

单选题According to paragraphs 6 and 7,which is most fundamental in producing hydroelectric power? ______.

单选题Despite the fact that they were ______when they married, alter 30 years they live together harmoniously.

单选题An (enormous) (variety) of information may be (obtained from) a (largest) magazine.

单选题Your first contact with an employer will be either to apply for a known job opening or to find out if any jobs are ______.

单选题A: It’s really hard to maintain contact when people move around so much. B:_____

单选题"Do you want to see my driver's license or my passport?" "Oh______."

单选题September 11 should have driven home a basic lesson for the Bush administration about life in an interconnected world: misery abroad threatens security at home. It is no coincidence that Osama Bin Laden found warm hospitality in the Taliban's Afghanistan, whose citizens were among the most impoverished and oppressed on earth. If the administration took this lesson seriously, it would dump the rules of realpolitik that have governed U.S. foreign aid policy for 50 years. Instead, it is pouring money into an ally of convenience, Pakistan, which is ultimately likely to expand the ranks of anti-American terrorists abroad. To enlist Pakistan in the fight against the Taliban, the Bush administration resurrected the Cold War tradition of propping up despotic military regimes in the name of peace and freedom. Its commitment of billions of dollars to Pakistan since September 11 will further entrench the sort of government that has made Pakistan both a development failure and a geopolitical hotspot for decades. Within Pakistan, the aid may ultimately create enough angry young men to make up A1 Qaeda's losses in Afghanistan. In South Asia as a whole, the cash infusion may accelerate a dangerous arms race with India. Historically, the U.S. government has cloaked aid to allies such as Pakistan in the rhetoric of economic development. As a Cold War ally, Pakistan received some $ 37 billion in grants and loans from the West between 1960 and 1990, adjusting for inflation. And since September 11, the U.S. administration has promised more of the' same. It has dropped sanctions imposed after Pakistan detonated a nuclear bomb in 1998, pushed through a $1.3 billion IMF loan for Pakistan, and called for another $2 billion from the World Bank and the Asian Development Bank. The Bush administration is also, ironically, pressing allies to join it in canceling or rescheduling billions of dollars of old (and failed) loans that were granted in past decades in response to similar arm-twisting. Despite--even because of--all this aid, Pakistan is now one of the most indebted, impoverished, militarized nations on earth. The causes of Pakistan's poverty are sadly familiar. The government ignored family planning, leading to population expansion from 50 million in 1960 to nearly 150 million today, for an average growth rate of 2.6 percent a year. Foreign aid meant to pave rural roads went into unneeded city highways--or pockets of top officials. And the military grew large, goaded by a regional rivalry with India that has three times bubbled into war. The result is a government that, as former World Bank economist William Easterly has observed, "cannot bring off a simple and cheap measles (麻疹) vaccination (预防接种) program, and yet...can build nuclear weapons./

单选题Directions:Forthispart,youareallowed30minutestowriteashortessayentitledTheComparisonofSpare-timeInterestsAmongUniversityStudents.Youshouldstartyouressaywithabriefdescriptionofthepiechartandwriteatleast150wordsbutnomorethan200words.1．大学生业余时间爱好比例对比2．产生这种现象的原因3．大学生应注意业余爱好不能占用太多学习时间

单选题There is evidence that the usual variety of high blood pressure is, in part, a familial disease. Since families have similar genes as well as similar environments, familial diseases could be due to shared genetic influences, to shared environmental factors, or to both. For some years, the role of one environmental factor commonly shared by families, namely dietary salt (i.e. sodium chloride), has been studies at Brook Haven National Laboratory. These studies suggest that frequent excess salt eating can lead to high blood pressure in man and animals. Some individuals, however, and some rats consume large amounts of salt without developing high blood pressure. No matter how strictly all environmental factors were controlled in these experiments, some salt-fed animals never developed high blood pressure whereas a few rapidly developed very serious high blood pressure followed by early death. These marked variations were interpreted to result from differences in genetic constitution. By mating in successive generations only those animals that failed to develop high blood pressure from salt eating, a resistant strain (the "R" strain) has been evolved in which consumption of large quantities of salt falls to influence the blood pressure significantly, in contrast, by mating only animals that quickly develop high blood pressure from salt, a sensitive strain ("S" strain) has also been developed. The availability of these two strains permits investigations not possible formerly. They provide a likely laboratory model on which to investigate some clinical (临床的) aspects of the human types of high blood pressure. More important, there might be the possibility of developing methods by which genetic likelihood of human beings to develop high blood pressure can be defined without waiting for its appearance. Radioactive (放射性的) sodium 22 was an important "tool" in working out the characteristics of the sodium chloride metabolism.