单选题The author of this essay seems to suggest that ______.

单选题WhatwaseducationlikeinProfessorWang'sdays?A.Studentsworkedveryhard.B.Studentsfelttheyneededaseconddegree.C.Educationwasnotcareer-oriented.D.Thereweremanyspecializedsubjects.

单选题Why does rain produce a lot of mosquitoes?

单选题 In this section you will hear everything ONCE ONLY. Listen carefully and then answer the questions that follow. Mark the correct answer to each question on your answer sheet.

单选题{{B}}Passage 1{{/B}} For centuries, explorers have risked their lives venturing into the unknown for reasons that were to varying degrees economic and nationalistic. Columbus went west to look for better trade routes to the Orient and to promote the greater glory of Spain. Lewis and Clark journeyed into the American wilderness to find out what the US had acquired when it purchased Louisiana, and the Appolo astronauts rocketed to the moon in a dramatic show of technological muscle during the cold war. Although their missions blended commercial and political-military imperatives, the explorers involved all accomplished some significant science simply by going where no scientists had gone. Today Mars looms as humanity's next great terra incognita. And with doubtful prospects for a short- term financial return, with the cold war a rapidly fading memory and amid a growing emphasis on international cooperation in large space ventures, it is-clear that imperatives other than profits or nationalism will have to compel human beings to leave their tracks on the planet's reddish surface. Could it be that science. which has long played a minor role in exploration, is at last destined to take a leading role? The question naturally invites a couple of others: Are there experiments that only humans could do on Mars? Could those experiments pro- vide insights profound enough to justify the expense of sending people across interplanetary space? {{U}}With Mars the scientific stakes are arguably higher than they have ever been{{/U}}. The issue of whether life ever existed on the planet, and whether it persists to this day, has been highlighted by mounting evidence that the Red Planet had abundant stable, liquid water and by the continuing controversy over suggestions that bacterial fossils rode to Earth on a meteorite from Mars. A more conclusive answer about life on Mars, past or present, would give researchers invaluable data about the range of conditions under which a planet can generate the complex chemistry that leads to life, If it could be established that life arose independently on Mars and Earth, the finding would provide the first concrete clues in one of the deepest mysteries in all of science: the prevalence of life in the universe.

单选题[此试题无题干]

单选题 {{I}}Questions 15 to 17 are based on the passage you have just heard.{{/I}}

单选题He doesn't come today. He ______ be ill. [A] must [B] can [C] should

单选题American humor and American popular heroes were born together, The first popular heroes of the new nation were comic heroes, and the first popular humor of the new nation was the antics of its hero-clowns. The heroic and the comic were combined in novel American proportions in popular literature. The heroic themes are obvious enough and not much different from those in the legends of other times and places: Achilles, Beowulf, Siegfried, Roland, and King Arthur. The American Davy Crockett legends repeat the familiar pattern of the Old World heroic story: the pre-eminence of a mighty hero whose fame in myth has a tenuous basis in fact; the remarkable birth and precocious strength of the hero; single combats in which he distinguished himself against antagonists, both man and beast; vows and boasts; pride of the hero in his weapons, his dog, and his woman. Davy Crockett conquered man and beast with a swaggering nonchalance. He overcame animals by force of body and will. He killed four wolves at the age of six; he hugged a bear to death; he killed a rattlesnake with his teeth. He mastered the forces of nature. Crockett's most famous natural exploit was saving the earth on the coldest day in history. First, he climbed a mountain to determine the trouble. Then he rescued all creation by squeezing bear-grease on the earth's frozen axis and over the sun's icy face. He whistled, "Push along, keep moving!" The earth gave a grunt and began moving. Neither the fearlessness nor the bold huntsman's prowess was peculiarly American. Far more distinctive was the comic quality, All heroes are heroic; few are also clowns. What made the American popular hero heroic also made him comic. "May be," said Crockett, "you'll laugh at me, and not at my book." The ambiguity of American life and the vagueness which laid the continent open to adventure, which made the land a rich storehouse of the unexpected, which kept vocabulary ungoverned and the language fluid — this same ambiguity suffused both the comic and the heroic. In a world full of the unexpected, readers of the Crockett legends were never quite certain whether to laugh or to applaud, or whether what they saw and heard was wonderful, awful, or ridiculous.

单选题______ we can find something about him on the Internet. A. Maybe B. May C. Must

单选题U. S. health officials are increasing surveillance measures at doctors' offices and international borders to guard against the spread of swine flu. Washington also has begun dispersing medicine from a federal stockpile. The Centers for Disease Control and Prevention says there have been only mild cases of swine flu in the United States, but experts remain on guard. Acting agency director, Richard Besser, says the epidemic in Mexico prompted U. S. doctors to begin monitoring actively for possible infections. "We are asking doctors when they see someone who has flu-like illness who has traveled to an affected region, to do a culture, take a swab in the nose and send it to the lab so we can see: is it influenza, is it this type?" he said. Speaking Sunday at the White House, Besser said the extra detection efforts have enabled officials to find more infections than under normal circumstances. He also says he expects the number of infections will rise and the illness will spread to other U. S. regions, as doctors continue to monitor the problem. The Centers for Disease Control and Prevention says it does not recommend people travel to Mexico, where the outbreak of swine flu is centered and more than 100 deaths have been reported. But officials have not ordered a travel ban to the country. Homeland Security Secretary Janet Napolitano says, instead, airlines have the option of screening passengers on flights from Mexico. "We are letting air carriers and our employees at the gates on those flights make sure that they are asking people if they are sick; and if they are sick, that they should not board the plane, " she said. Denise Korniewicz, an infectious disease expert at the University of Miami, says officials should take bolder steps to screen passengers at international borders, as Japan and other Asian nations are doing. "We have a very transient population here. And Japan has taken a lot of precautions. What Japan is doing is they are making everyone take a temperature when they get off the airplane, " she said. "As far as I am concerned, I think that is a good idea. " U. S. officials say they are holding off on more aggressive actions because the outbreak has been limited in the United States and they do not want to cause a health scare. Korniewicz says around the country health centers are putting in place emergency response measures aimed at limiting disease outbreaks.