单选题{{B}}Passage Two{{/B}} Ethiopians appear to have evolved a unique way of coping with thin mountain air. But how they do it remains a mystery. One way for the body to get enough oxygen to its tissues when breathing oxygen-poor air is for it to make more red blood cells. This increases the amount of hemoglobin(血红蛋白), the protein that carries oxygen. Although less haemoglobin in the arteries is saturated with oxygen at high altitudes, having more of it makes up for the shortfall. People native to the high Andes are known to have more red blood cells than lowlanders, and athletes who train at altitude can increase their concentration of cells. But while many Tibetans also live at high altitudes, they do not have significantly elevated levels of haemoglobin. Instead they seem to boost the amount of nitric oxide, which dilates(使膨胀) blood vessels and increases blood flow. Now Cynthia Beall, an anthropologist from Case Western Reserve University in Cleveland, Ohio, has found a third kind of adaptation. When she tested the blood of 236 people in the Ambaras region in the Semien Mountains of Ethiopia, she found that 95 percent of the haemoglobin in their arteries is saturated with oxygen, almost as much as that of people living at low altitudes and roughly 5 per cent above that of residents in the Andes or Tibet. "That shouldn't be, "says Beall. They must have a massively efficient way to get oxygen from the lungs to the blood, she says. But just what remains mysterious. They do not have higher concentrations of haemoglobin than anyone else, nor do they have a different kind of haemoglobin. Beall adds that this ability might be found in all people living in that part of the world, and not just those in the study. It might be why so many world-class endurance athletes are Ethiopian. "The next study needs to look at that,"she says.

单选题To whom does the mother speak Korean? A. Her oldest daughter only. B. Her two daughters only. C. All of her children. D. Only to her son.

单选题Choose the best from the following sentences marked A to E to complete the article below. Write your answers on the ANSWER SHEET. A Bad Time for Britain to Say "Auf Wiedersehen" History records that the then prime minister Margaret Thatcher scoffed at British diplomats" self-interested realism. Waving a map delineating past German expansionism, she embarked on a doomed effort to thwart unification. Francois Mitterrand was enlisted but the French president soon changed sides in the face of Helmut Kohl"s resolve. Britain found itself marginalised in Washington, where George H. W. Bush backed Mr. Kohl, and unwelcome in Bonn. 11. ______ This is not to say they are good. The relationship between Angela Merkel and David Cameron has turned from lukewarm to distinctly cool. Asked when the two leaders will next meet, one German official remarks: "What"s the point?" The eurozone crisis has bred a more assertive Germany—witness its willingness this week to scupper the proposed takeover of BAE Systems by EADS. 12. ______. The rot set in last December when Mr. Cameron tried to veto deeper economic and political eurozone integration. His pitch for special privileges and protections for the City of London was viewed in Berlin as an attempt to unpick the essential fabric of the single market—the EU"s cherished "acquis". 13. ______ What"s the point of Ms Merkel striking deals in Downing Street if they are cast aside when he feels a need to play to the eurosceptic gallery? Germany recently signed up to a British initiative to freeze the EU budget. Now it finds Mr. Cameron waving a unilateral veto. British ministers are also questioning some of the union"s fundamental pillars, including free movement of people. 14. ______ British disengagement from "core" Europe is inevitable. The government has already said it will not join a new banking union. Mr. Cameron is now suggesting a two-tier EU budget so that Westminster can pay less. Were Britain planning to leave the union—and on its present trajectory it is heading in that direction, such complacency might just make sense. But Mr. Cameron insists that EU membership remains vital to the nation"s prosperity. Any serious business leader would agree. Britain, albeit mostly by choice, is sliding fast into Europe"s second division. Whether a new relationship can be made to work will depend on how many friends it has. 15. ______ The breakdown of the EADS-BAE deal was another reminder, if one were needed, that Britain cannot escape the consequences of decisions taken on the continent. Mr. Cameron has Chosen the wrong moment to bid auf Wiedersehen to a natural ally. Questions A. But the real argument with Britain is about Europe. B. Relations between Britain and Germany are not as bad now as they were then. C. The answer at the moment is precious few. D. Mr. Cameron"s indulgence of hardline Tory eurosceptics has cast him as an unreliable partner. E. What does it matter if the Germans are cross?

单选题Battles are like marriages. They have certain fundamental experience they share in common; they differ infinitely, but still they are all alike. A battle seems to me a conflict of wills to the death in the same way that a marriage of love is the identification of two human beings to the end of the creation of life—as death is the reverse of life, and love of hate. Battles are commitments to cause death as marriages are commitments to create life. Whether, for any individual, either union results in death or in the creation of new life, each risks it—and in the risk commits himself. As the servants of death, battles will always remain horrible. Those who are fascinated by them are being fascinated by death. There is no battle aim worthy of the name except that of ending all battles. Any other conception is, literally, suicidal. The fascist worship of battle is a suicidal drive; it is love of death instead of life. In the same idiom, to triumph in battle over the forces which are fighting for death is-again literally-to triumph over death. It is a surgeon's triumph as he cuts a body and bloodies his hands in removing a cancer in order to triumph over the death that is in the body. In these thoughts I have found my own peace, and I return to an army that fights death and cynicism in the name of life and hope. It is a good army. Believe in it.

单选题For dinner that evening we had some ______ turtle meat.

单选题It was ______ we had hoped. A. more a success than B. a success more than C. as much of a succes as D. a success as much as

单选题The two claws of the mature American lobster are decidedly different from each other. The crusher claw is short and stout; the cutter claw is long and slender. Such bilateral asymmetry, in which the fight side of the body is, in all other respects, a mirror image of the left side, is not unlike handedness in humans. But where the majority of humans are righthanded, in lobsters the crasher claw appears with equal probability on either the right side or left side of the body. Bilateral asymmetry of the claws comes about gradually. In the juvenile fourth and fifth stages of development, the paired claws are symmetrical and cutter like. Asymmetry begins to appear in the juvenile sixth stage of development, and the paired claws further diverge toward welldefined cutter and crusher claws during succeeding stages. An intriguing aspect of this development was discovered by Victor Emmer. He found that if one of the paired claws is removed during the fourth or fifth stage, the intact claw invariably becomes a crusher, while the regenerated claw becomes a cutter. Removal of a claw during a later juvenile stage or during adulthood, when asymmetry is present, does not alter the asymmetry; the intact and regenerate claws retain their original structures. These observations indicate that the conditions that trigger differentiation must operate in a random manner when the paired claws are intact, but in a nonrandom manner when one of the claws is lost. One possible explanation is that differential use of the claws determines their asymmetry. Perhaps the claw that is used more becomes the crusher. This would explain why, when one of the claws is missing during the fourth or fifth stage, the intact claw always becomes a crusher. With two intact claws, initial use of one claw might prompt the animal to use it more than the other throughout the juvenile fourth and fifth stages, causing it to become a crusher. To test this hypothesis, researchers raised lobsters in the juvenile fourth and fifth stages of development in a laboratory environment in which the lobsters could manipulate oyster chips. (Not coincidentally, at this stage of development lobsters typically change from a habitat where they drift passively, to the ocean floor where they have the opportunity to be more active by borrowing in the substrate. ) Under these conditions, the lobsters developed asymmetric claws, half with crusher claws on the left, and half with crusher claws on the right. In contrast, when juvenile lobsters were reared in a smooth tank without the oyster chips, the majority developed two cutter claws. This unusual configuration of symmetrical cutter claws did not change when the lobsters were subsequently placed in a manipulable environment or when they lost and regenerated one or both claws.

单选题This style of writing, incidentally, is suggestive of what is called the "newsreel technique" of John Dos Passos. A. reminiscent B. collective C. forgettable D. advisable

单选题The text seems to imply that other forms of life in the cosmos ______.

单选题 If a farmer wishes to succeed, he must try to keep a wide gap between his consumption and his production. He must store a large quantity of grain{{U}} (31) {{/U}}consuming all his grain immediately. He can continue to support himself and his family{{U}} (32) {{/U}}he produces a surplus. He must use this surplus in three ways: as seed for sowing, as an insurance{{U}} (33) {{/U}}the unpredictable effects of bad weather and as a commodity which he must sell in order to{{U}} (34) {{/U}}old agricultural implements and obtain chemical fertilizers to{{U}} (35) {{/U}}the soil. He may also need money to construct irrigation{{U}} (36) {{/U}}and improve his farm in other ways. If no surplus is available, a farmer cannot be{{U}} (37) {{/U}}. He must either sell some of his property or{{U}} (38) {{/U}}extra fids in the form of loans. Naturally he will try to borrow money at a low{{U}} (39) {{/U}}of interest, but loans of this kind are not{{U}} (40) {{/U}}obtainable.

单选题The main part of the title of the novel was taken from Bunyan" s The Pilgrim" s Progress, in which the pilgrims arrive at a place where all such merchandise are sold, as houses, lands, trades, honors , titles, countries, and delights of all sorts. . . The subtide of the novel reinforces the point, for it indicates that the novel is concerned principally not with individual heroes but with the society as a whole, though it is also possible to interpret the phrase as meaning that there are only heroines or one heroine but no heroes. And indeed the novel evolves chiefly around two women, Amelia Sedley and Becky Sharp.Which novel does the following passage discuss?

单选题A: Excuse me. What subway station am I in? I got lost. B: ______

单选题If x dollars are invested at 12 percent for one year and y dollars are invested at 8 percent for one year, the annual income from the 8 percent investment will exceed the annual income from the 12 percent investment by $64. If $5,000 is the total amount invested between x and y, how much is invested at 12 percent? A. $1,680 B. $1,997 C. $3,003 D. $3,320 E. $3,500

单选题Where are most likely to be affected by caner-inducing agents according to the passage? ( )

单选题In the author's view, if an American business makes an immoral decision as a group, the man aging individuals ______.

单选题W: Carol told us on the phone not to worry about her. Her left leg doesn't hurt as much as it did yesterday.M: She'd better have it examined by a doctor anyway. And I will call her about it this evening.Q: What does the man think Carol should do? A. See a doctor. B. Stay in bed for a few days. C. Get treatment in a better hospital. D. Make a phone call to the doctor.