单选题. Questions 23 to 25 are based on the passage you have just heard.8.

单选题. Questions 5 to 7 are based on the news report you have just heard.5.

单选题. Baekeland and Hartmann report that the "short sleepers" had been more or less average in their sleep needs until the men were in their teens. But at about age 15 or so, the men voluntarily began cutting down their nightly sleep time because of pressures from school, work, and other activities. These men tended to view their nightly periods of unconsciousness as bothersome interruptions in their daily routines. In general, these "short sleepers" appeared ambitious, active, energetic, cheerful, nonconformist (不动摇) in their opinions, and very sure about their career choices. They often held several jobs at once, or workers full-or part-time while going to school. And many of them had a strong urge to appear "normal" or "acceptable" to their friends and associates. When asked to recall their dreams, the "short sleepers" did poorly. More than this, they seemed to prefer not remembering. In similar fashion, their usual way of dealing with psychological problems was to deny that the problem existed, and then to keep busy in the hope that the trouble would go away. The sleep patterns of the "short sleepers" were similar to, but less extreme than, sleep patterns shown by many mental patients categorized as manic (疯人). The "long sleepers" were quite different indeed. Baekeland and Hartmann report that these young men had been lengthy sleeps since childhood. They seemed to enjoy their sleep, protected it, and were quite concerned when they were occasionally deprived of their desired 9 hours of nightly bed rest. They tended to recall their dreams much better than did the "short sleepers". Many of the "long sleepers" were shy, anxious, introverted (内向), inhibited (压抑), passive, mildly depressed, and unsure of themselves (particularly in social situations). Several openly states that sleep was an escape from their daily problems.1. The report suggests that ______.

单选题Obesity is the single greatest cause of early deaths after smoking.It results in more years of unhealthy life，diminishing the quality of life.It also increases many physical and mental health issues，f

单选题《复合题被拆开情况》 Recent research has shown that the stress hormone Cortisol 皮质醇 damages certain neurons in the brain and can negatively affect memory and learning ability in the elderly. Researchers wanted

单选题[此试题无题干]

单选题. Child psychologists—and kindergarten teachers—have long known that when children first show up for school, some of them speak a lot more fluently than others. Psychologists also know that children's socioeconomic status tends to be closely connected with their language facility. The better off and more educated a child's parents are, the better vocabulary ability that child tends to have by school age—and vocabulary skill is a key predictor for success in school. Children from low-income families, who may often start school knowing significantly fewer words than their better-off peers, will struggle for years to make up that ground. Previous studies have shown that wealthier, educated parents talk to their young children more, using more complex vocabulary and sentences, than parents of lesser means. And these differences may help explain why richer kids start school with richer vocabularies. But what goes on before children can talk, during that phase—familiar to any parent—when communication takes the form of pointing, waving, grabbing and other kinds of baby sign language? Do well—off parents also gesture more to their kids? Indeed they do, say psychologists Susan Goldin-Meadow and Meredith Rowe of the University of Chicago. The researchers found that at 14 months of age, babies already showed a wide range of "speaking" ability through gestures, and that those differences were closely linked with their socioeconomic background and how frequently their parents used gestures to communicate. High-income, better-educated parents gestured more frequently to their children to convey meaning and new concepts, and in turn, their kids gestured more to them. When researchers tested the same children at 54 months of age, they found that those early gesturers turned out to have better vocabulary ability than other students. At 14 months of age, researches say, pointing toward an object is the way most kids use gestures. If a parent responds to that gesture by identifying the object in words—by saying, "That's a doll," for example—children get a head start on growing their original vocabularies. "That's a teachable moment, and mothers are teaching the kids the word for an object," says Goldin-Meadow.1. Psychologists have found that children's language ability largely depends on ______.

单选题《复合题被拆开情况》 By almost any measure, there is a boom in Internet-based instruction. In just a few years, 34 percent of American universities have begun offering some form of distance learning DL, and amo

单选题《复合题被拆开情况》 Brain-training software may be a waste of time. People who played "mind-boosting" games made the same modest cognitive gains as those who spent a similar amount of time surfing the web. "It

单选题. Questions 5 to 7 will be based on the following news item.5.

单选题. Questions 16 to 18 are based on the passage you have just heard.1.

单选题[此试题无题干]

单选题. Questions 3 and 4 are based on the news report you have just heard.3.

单选题《复合题被拆开情况》 As you crest 到达 a rise on Mississippi’s Highway 63, a calm brown waterway flows beneath the bridge, and cranes and derricks 油井架 are revealed in the distance. The near view gives the region

单选题The human face is a remarkable piece of work.The astonishing variety of facial features helps people 26_____ each other and is crucial to the formation of complex societies.So is the faces abilit