单选题 When it comes to foods, America is not just the fattest country on earth but probably the most schizophrenic as well--home to the Big Mac and Weight Watchers, the super model and the couch potato. The love-hate relationship with food was examined in the documentary "Fat" which aired on November 3, and if there is any comfort for the more than 90 million overweight Americans it's that the rest of the world is also getting fatter. "There is an enormous pressure on people to be thin and to be physically fit but at the same time there is a tremendous pressure and inducement to eat, "Or Kelly Brownell, professor of psychology at Yale University and a participant in the programme, said in an interview. "You will see a Baskin Robbins next to Weight Watchers. You'll see a Family Circle magazine with a delicious chocolate cake on the cover beside a diet article, "said Brownell. "At the same time as we have record levels of obesity, we have record levels of eating disorders too," he said. The desire to eat fatty food came from a primitive survival instinct to store enough energy in good times to ensure survival when food was scare. But in a modern urban society, where fast food chains appear on almost every block, the instinct to eat far has begun to work against us. The documentary claims that nowhere is the exposure to junk food more prevalent than in the United States, where the problem has been compounded by the increasingly sedentary modern lifestyle. It also says that members of Arizona's Pima Indian tribe are the fattest people in the fattest country on earth. Until recently the tribe lived a simple life, but in 1984 when the tribe won a gaming stream. Today the tribe is plagued by obesity, high blood pressure and heart disease. Just 800 kms south in Mexico, another branch of the Pima tribe continues to live a traditional life and eats a traditional diets. These Pima have none of the problems of their American counterparts, who are on average 27kgs heavier. Part of the problem, according to Brownetl, is the intense advertising of junk food in the United States. The average American child sees thousands of TV commercials each year, most of which advertise fast food, candy and sodas. The food environment has become so "toxic" according to the documentary, that some US schools even offers fast food such as McDonald's and Burger King in school cafeterias.

单选题According to the author, most scientists explain animal behaviors in terms of reflexes and conditioning because

单选题What can we know about the origin of "tip"?

单选题There is nothing like the suggestion of a cancer risk to scare a parent, especially one of the over-educated, eco-conscious type. So you can imagine the reaction when a recent USA Today investigation of air quality around the nation's schools singled out those in the smugly green village of Berkeley, Calif., as being among the worst in the country. The city's public high school, as well as a number of daycare centers, preschools, elementary and middle schools, fell in the lowest 10 %. Industrial pollution in our town had supposedly turned students into living science experiments breathing is a laboratory's worth of heavy metals like manganese, chromium and nickel each day. This is a city that requires school cafeterias to serve organic meals. Great, I thought, organic lunch, toxic campus. Since December, when the report came out, the mayor, neighborhood activists and various parent-teacher associations have engaged in a fierce battle over its validity: over the guilt of the steel-casting factory on the western edge of town, over union jobs versus children's health and over what, if anything, ought to be done. With all sides presenting their own experts armed with conflicting scientific studies, whom should parents believe? Is there truly a threat here, we asked one another as we dropped off our kids, and if so, how great is it? And how does it compare with the other, seemingly perpetual health scares we confront, like panic over lead in synthetic athletic fields? Rather than just another weird episode in the town that brought you protesting environmentalists, this latest drama is a trial for how today's parents perceive risk, how we try to keep our kids safe-whether it's possible to keep them safe-in what feels like an increasingly threatening world. It raises the question of what, in our time, "safe" could even mean. "There's no way around the uncertainty, " says Kimberly Thompson, president of Kid Risk, a nonprofit group that studies children's health. "That means your choices can matter, but it also means you aren't going to know if they do. " A 2004 report in the journal Pediatrics explained that nervous parents have more to fear from fire, car accidents and drowning than from toxic chemical exposure. To which I say: Well, obviously. But such concrete hazards are beside the point. It's the dangers parents can't-and may never-quantify that occur all of sudden. That's why I've rid my cupboard of microwave food packed in bags coated with a potential cancer-causing substance, but although I've lived blocks from a major fault line for more than 12 years, I still haven't bolted our bookcases to the living room wall.

单选题 Questions 18～20 are based on a monologue about e-commerce. You now have 15 seconds to read Questions 18～20.

单选题Theodore Dreiser and Jack London are among the best representative writers of literary ______, which is greatly influenced by Darwin. A. naturalism B. sentimentalism C. romanticism D. transcendentalism

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单选题[此试题无题干]

单选题Some personal characteristics play a vital role in the development of one's intelligence. But people fail to realize the importance of cultivating these factors in young people. The so-called "non-intelligence factor" include (21) feelings, will, motivation, interests and habits. After a 30-year follow-up study of 8,000 males, American psychologists (22) that the main cause of disparities in intelligence is not intelligence (23) , but non-intelligence factors including the desire to learn, will-power and self-confidence. (24) people all know that one should have definite objectives, a strong will and good learning habits, quite a number of teachers and parents don't pay much attention to (25) these factors. Some parents are greatly worried (26) their children fail to do well in their studies. They blame either genetic factors, malnutrition, or laziness, but they never take (27) consideration these non-intelligence factors. At the same time, some teachers don't inquire into these, such as reason (28) students do poorly. They simply give them more course and exercises, or (29) rebuke or ridicule them. After all, these students lose self-confidence. Some of them just feel defeated and (30) themselves up as hopeless. Others may go astray because they are sick of learning. (31) investigation of more than 1,000 middle students in Shanghai showed that 46.5 percent of them were (32) of learning because of examination, 36.4 percent lacked persistence, initiative and conscientiousness and 10.3 percent were sick of learning. It is clear (33) the lack of cultivation of non-intelligence factors has been a main (34) to intelligence development in teenagers. It even causes an imbalance between physiological and (35) development among a few students. If we don't start now to (36) the cultivation of non-intelligence factors, it will not only obstruct the development of the (37) of teenagers, but also affect the quality of a whole generation. Some experts have put forward (38) about how to cultivate student's non-intelligence factors. First, parents and teachers should (39) understand teenage psychology. On this basic, they can help them to pursue the objectives of learning, (40) their interests and toughening their willpower.