单选题 In our class there are 46 students
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单选题. Now listen to the following recording and answer questions 16 to 19.1.
单选题. Now listen to the following recording and answer questions 20 to 22.5.
单选题. Questions 19 to 21 are based on the recording you have just heard.4.
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单选题. Questions 13 to 15 are based on the passage you have just heard.5.
单选题. The planet's wild creatures face a new threat—from yuppies (雅皮士), empty nesters and one parent families. Biologists studying the pressure on the planet's dwindling biodiversity today report on a new reason for alarm. Although the rate of growth in the human population is decreasing, the number of individual households is exploding. Even where populations have actually dwindled in some regions of New Zealand, for instance—the numbers of individual households has increased, because of divorce, career choice, smaller families and longer lifespan. Jianguo Liu of Michigan State University and colleagues from Stanford University in California report in Nature, in a paper published online in advance, that a greater number of individual households, each containing on average fewer people, meant more pressure on natural resources. Towns and cities began to sprawl as new homes were built. Each household needed fuel to heat and light it; each household required its own plumbing, cooking and refrigeration. "In larger households, the efficiency of resource consumption will be a lot higher, because more people share things," Dr Liu said. He and his colleagues looked at the population patterns of life in 141 countries, including 76 "hotspot" regions unusually rich in a variety of local wildlife. These hotspots included Australia, New Zealand, the US, Brazil, China, India, Kenya, and Italy. They found that between 1985 and 2000 in the "hotspot" parts of the globe, the annual 3.1% growth rate in the number of households was far higher than the population growth rate of 1.8%. "Had the average household size remained at the 1985 level," the scientists report, "there would have been 155 million fewer households in hotspot countries in 2000. Dr Liu's work grew from the alarming discovery that the giant pandas living in China's Wolong reserve are more at risk now than they were when the reserve was first established. The local population had grown, but the total number of homes had increased more swiftly, to make greater inroads into the bamboo forests. Only around 1.75 million species on the planet have been named and described. Biologists estimate that there could be 7 million, or even 17 million, as yet to be identified. But human numbers have grown more than sixfold in the past 200 years, and humans and their livestock are now the greatest single consumer group on the planet. The world population will continue to soar, perhaps leveling off around 9 billion in the next century. Environmental campaigners have claimed that between a quarter and a half of all the species on earth could become extinct in the next century.1. Biologists report that the biodiversity is decreasing because ______.
单选题Questions 1 to 5 are based on the following passage.Using Facebook makes people sadder, at least according to some research.But just what is it about the social network that takes a hit on our mood? A
单选题 Fertilizer use has exploded
单选题. Questions 1 to 4 are based on the conversation you have just heard.1.
单选题. Questions 1 to 4 are based on the conversation you have just heard.1.
单选题Questions 1 to 10 are based on the following passage.Although interior design has existed since the beginning of architecture, its development into a____1____field is really quite recent.Interior desi
单选题. Questions 22 to 25 are based on the recording yon have just heard.7.
单选题. While human achievements in mathematics continue to reach new levels of complexity, many of us who aren't mathematicians at heart (or engineers by trade) may struggle to remember the last time we used calculus (微积分). It's a fact not lost on American educators, who amid rising math failure rates are debating how math can better meet the real-life needs of students. Should we change the way math is taught in schools, or eliminate some courses entirely? Andrew Hacker, Queens College political science professor, thinks that advanced algebra and other higher-level math should be cut from curricula in favor of courses with more routine usefulness, like statistics. "We hear on all sides that we're not teaching enough mathematics, and the Chinese are running rings around us," Hacker says. "I'm suggesting we're teaching too much mathematics to too many people.., not everybody has to know calculus. If you're going to become an aeronautical (航空的) engineer, fine. But most of us aren't." Instead, Hacker is pushing for more courses like the one he teaches at Queens College: Numeracy 101. There, his students of "citizen statistics" learn to analyze public information like the federal budget and corporate reports. Such courses, Hacker argues, are a remedy for the numerical illiteracy of adults who have completed high-level math like algebra but are unable to calculate the price of, say, a carpet by area. Hacker's argument has met with opposition from other math educators who say what's needed is to help students develop a better relationship with math earlier, rather than teaching them less math altogether. Maria Droujkova is a founder of Natural Math, and has taught basic calculus concepts to 5-year-olds. For Droujkova, high-level math is important, and what it could use in American classrooms is an injection of childlike wonder. "Make mathematics more available," Droujkova says. "Redesign it so it's more accessible to more kinds of people: young children, adults who worry about it, adults who may have had bad experiences." Pamela Harris, a lecturer at the University of Texas at Austin, has a similar perspective. Harris says that American education is suffering from an epidemic of "fake math"—an emphasis on rote memorization (死记硬背) of formulas and steps, rather than an understanding of how math can influence the ways we see the world. Andrew Hacker, for the record, remains skeptical. "I'm going to leave it to those who are in mathematics to work out the ways to make their subject interesting and exciting so students want to take it," Hacker says. "All that I ask is that alternatives be offered instead of putting all of us on the road to calculus."1. What does the author say about ordinary Americans? ______
单选题. Questions 16 to 19 are based on the recording you have just heard.1.
单选题. Questions 12 to 15 are based on the passage you have just heard.4.
单选题23. A culture in which the citizens share similar religious beliefs and values is more likely to have laws that represent the wishes of its people than is a culture where citizens come from ______ backgrounds.
单选题. Questions 22 to 25 are based on the recording you have just beard.7.