单选题The Need to Remember Some people say they have no memory at all: "I just can't remember a thing!" But of course we all have a memory. Our memory tells us who we are. Our memory helps U.S. to make use in the present of what we have learnt in the past. In fact we have different types of memory. For example, our visual memory helps us recall facts and places. Some people have such a strong visual memory that they can remember exactly what they have seen, for example, pages of a book, as a complete picture. Our verbal memory helps us remember words and figures we may have heard but not seen or written: items of a shopping list, a chemical formula, dates, or a recipe. With our emotional memory, we recall situations or places where we had strong feelings, perhaps of happiness or unhappiness. We also have special memories for smell, taste, touch and sound, and for performing physical movements. We have two ways of storing any of these memories. Our short-term memory stores items for up to thirty seconds-enough to remember a telephone number while we dial. Our long-term memory, on the other hand, may store items for a lifetime. Older people in fact have a much biter long-term memory than short-term. They may forget what they have done only a few hours ago, but have the clearest remembrance of when they were very young. Psychologists tell us that we only remember a few facts about our past, and that we invent the rest. It is as though we remember only the outline of a story. We then make up the details. We often do this in the way we want to remember them, usually so that we appear as the heroes of our own past, or maybe victims needing sympathy.

单选题That guy is really witty.

单选题He purchased a ticket and went up on the top deck.A. tookB. boughtC. showedD. made

单选题It is said that the houses along this street will soon be demolished.

单选题This poem depicts the beautiful scenery of a town in the South. A. praises B. writes C. imitates D. describes

单选题Ulcers Even though ulcers appear to run in families, lifestyle plays more of a role than genetic factors in causing the illness, according to a report in the April 13th Journal of Internal Medicine. In particular, smoking and stress in men and the regular use of pain releasing medicines in women were linked with an increased risk of developing all ulcers. Overall, 61% of ulcer risk appears to be due to environmental factors, such as smoking, and the remaining 39% is due to genes according to Dr. Ismo Raiha of the University of Turky and colleagues at the University of Helsinki, Finland. Some researchers had suggested that families may spread Helicobacteria pylori, the bacteria that can cause ulcers. However, the new study suggests this is unlikely, according to the report. Raiha and colleagues studied data from more than 13,000 pairs of twins "to examine the roles of genetic and environmental factors in the origin of peptic ulcer disease", they explain. Both twins were more likely to develop an ulcer if the pair were genetically the same as compared with a pair of fraternal twins, suggesting that there must be some genetic susceptibility to ulcer development. However, the risk was no greater in twins living together compared with twins living apart, suggesting that shared exposure to H. pylori (幽门螺旋杆菌) was not to blame. " Environmental effects were not due to factors shared by family members, and they were related to smoking and stress in men and the use of analgesics in women," the authors wrote. "The minor effects of shared environment to disease liability do not support the concept that the grouping of risk factors, such as H. pylori infection, would explain the genetic factor of peptic ulcer disease," they concluded.

单选题I am used to ______ a bath before dinner.A. to haveB. havingC. hadD. have

单选题Nashville, Tennessee, boasts some of the finest country music performers in the United States.

单选题Mrs. Smith looked {{U}}puzzled{{/U}} about what her husband said just now.

单选题While we don"t agree, we continue to be friends.

单选题Five years ago he was a {{U}}fabulously{{/U}} wealthy man, but now he was penniless.

单选题I was shocked when I saw the size of the telephone bill.

单选题What Is the Coolest Gas in the Universe? What is the coldest air temperature ever recorded on the earth? Where was this low temperature recorded? The coldest recorded temperature on Earth was -91℃, which 1 in Antarctica in 1983. We encounter an interesting situation when we discuss temperatures in 2 temperatures in Earth orbit actually range from about 20℃ to 120℃. The temperature depends upon 3 you are in direct sunlight or shade. Obviously, -120℃ is colder than our body can safely endure. Thank NASA science for well-designed space 4 that protect astronauts from these temperature extremes. The space temperatures just discussed affect only our areal of the solar 5 . Obviously, it is hotter closer to the sun and colder as we travel away from the sun. Astronomers estimate temperatures at Pluto are about -210℃. How cold is the lowest estimated temperature in the entire universe? Again, it depends upon your 6 . We are taught it is supposedly 7 to have a temperature below absolute zero, which is -273℃, at which atoms do not move. Two scientists, whose names are Cornell and Wieman, have successfully cooled down a gas to a temperature barely 8 absolute zero. They won the Nobel Prize in Physics in 2001 for their work—not a discovery, in this case. Why is the two scientists" work so important to science? In the 1920s, Satyendra Nath Bose was studying an interesting 9 about special light particles we now call photons. Bose had trouble 10 other scientists to believe his theory, 11 he contacted Albert Einstein. Einstein"s calculations helped him theorize that atoms 12 behave as Bose thought—but only at very cold temperatures. Scientists have also discovered that 13 atoms can help them make the world"s atomic docks even more accurate. These clocks are so accurate today they would only lose one second 14 six million years! Such accuracy will help us travel in space because distance is velocity times time (d=v×t). With the long distances involved in space 15 , we need to know time as accurately as possible to get accurate distance.

单选题{{B}}第三篇{{/B}} {{B}}15 Million Americans Suffer from Social Anxiety Disorder{{/B}} Social anxiety disorder prevents some 15 million Americans from leading normal social and romantic lives, a new survey finds. The disorder leaves many isolated, ashamed and often misdiagnosed. Thirty-six percent of those with social anxiety disorder have symptoms for 10 years or more before seeking help, the Anxiety Disorders Association of America reports. "Social anxiety disorder is when somebody has an intense, persistent and irrational fear of social or performance situations," Jerilyn Ross, the association's president and CEO, said during a teleconference Wednesday. "The condition causes people to avoid common, everyday situations and even other people for fear of being judged or criticized or humiliated or embarrassing themselves," Ross said. Social anxiety disorder can interfere with daily routines and job performance, Ross noted. "It also makes it very difficult for people to develop friends and romantic partnerships," she said. People with this disorder recognize their fear is excessive and irrational, Ross noted. "But they feel powerless to do anything about it," she said. Social anxiety disorder can start in the early teens, Dr. Mark H. Pollack, director of the Center for Anxiety and Traumatic Stress Disorders and a professor of psychiatry at Harvard Medical School, said during the teleconference. "This is a disorder that starts affecting people early on," Pollack said. "The typical age of onset is early adolescence, age 12 or 13, and many individuals report a history of anxiety dating back to earlier childhood." "The disorder also has physical symptoms, including heart palpitations, feelings that their throat will close up, sweating, blushing, faintness, trembling and stammering," Ross said. "Among people with the disorder, 75 percent said the condition affected their ability to do normal activities. In addition, 69 percent said they didn't want people to think they were crazy, and 58 percent said they were embarrassed by their condition, "Ross said. However, when the condition is diagnosed and treated, many reported improvement in their lives. In fact, 59 percent who were receiving treatment said treatment had a positive effect on their ability to have a romantic relationship. In addition, 39 percent who had received treatment said knowing that treatment can be successful aided their decision to get help, Ross noted.

单选题For most allergies, the best treatment is elimination of the {{U}}bothersome{{/U}} substances from the sensitive person's environment.

单选题Many Women Who Beat Cancer Don"t Change Habits Many women who battle breast cancer will tell you it"s a life-changing experience. However, a new study shows that for many 1 , the changes aren"t always positive or permanent. Beth Snoke has watched her mother and both grandmothers battle and survive breast 2 . So when she was diagnosed, there was no doubt in her mind 3 she had to do. "I do exactly what the doctors say as far as the medicine that I"m on, as 4 as the vitamins, the diet, and the fitness. And I can"t stress enough 5 important that is," says Beth Snoke. But a surprising new study shows that 6 every woman who beats breast cancer is getting that message. In fact, nearly 40% of them say even 7 surviving breast cancer, they haven"t made significant changes in the 8 they eat or how much they exercise. "Not all survivors are taking advantage of this teachable moment and making positive health changes in 9 life," says Electra Paskett, PhD, at Ohio State University"s Comprehensive Cancer Center. Paskett says diet and exercise have been proven to not only help women feel better during and after treatment, they may 10 play a role in preventing some cancers from coming back. 11 growing evidence, some women just aren"t listening. "Colon cancer survivors 12 exercise have actually been shown to have improved survival rates. So, yes, it is true that perhaps by making some of these healthy choices we can actually increase their health," says Paskett. As a breast cancer survivor 13 , Paskett knows first hand how much difference diet and exercise can 14 . The challenge, she says, is to get more survivors to be more like Beth, during and after treatment. Experts say exercising more and eating a healthier diet can also cut 15 on stress and help women overcome depression. There are more than 2 million breast cancer survivors living in the U.S. of those, nearly a million have yet to change their diet or exercise routines.

单选题They have accomplished their mission successfully.A. realizedB. designedC. completedD. arranged

单选题Everyone said he was a decent sort of guy.

单选题After a bitter struggle the rebels were forced to Usubmit/U.

单选题The high-speed trains can have a major impact on travel preferences. A. influence B. force C. surprise D. power