单选题Tom found damnably difficult, for three reasons.A. veryB. undeniableC. lessD. unchangeable

单选题In that last sentence. Davies set forth the national ethic of health care in his country: medicine is not a commodity to be sold to the highest bidder, but a right that must be distributed equitably (公平合理的) to one and all. In short, the Canadians have built a health - care system that neatly fits the Canadian character: ferociously egalitarian (平等主义的), but thrifty at the same time. According to the author, Canadians are.A. extremely egalitarian and thriftyB. extremely egalitarian but not thriftyC. not egalitarian at all but thriftyD. neither egalitarian nor thrifry

单选题Poor health and lack of money may both be to educational progress roadblocks. A. restraints B. stains C. scarcities D. barriers

单选题The Ebola virus transmits by contact with _______.

单选题Her father was a quiet man with graceful manners.

单选题This vaccine is egg - based. What if I'm allergic to eggs? You should avoid the vaccine. If you're in a high - risk group and you come down with the flu, see your doctor immediately. Antiviral medications, given within 24 to 48 hours of the onset of symptoms, can dramatically improve one's outcome. The vaccine should avoid application to a person whoA. is allergic to eggs.B. is in a high - risk group.C. has come down with the flu.D. has symptoms of the flu.

单选题There is been {{U}}competition{{/U}} between the two Motor car firms.

单选题The once barren hillsides are now good farmland.

单选题She was really frightfully {{U}}ugly{{/U}}.

单选题 Diseases of Agricultural Plants Plants, like animals, are subject to diseases of various kinds. It has been estimated that some 30,000 different diseases attack our economic plants; forty are known to attack com, and about as many attack wheat. The results of unchecked plant disease are all too obvious in countries which have marginal food supplies. The problem will soon be more widespread as the population of the world increases at its frightening rate. Even in countries which are now amply fed by their agricultural products there could soon be critical food shortages. It is easy to imagine the consequences of some disastrous attack on one of the major crops; the resulting famines could kill millions of people, and the resulting hardship on other millions could cause political upheavals disastrous to the order of the world. Some plants have relative immunity to a great many diseases, while others have a susceptibility to them. The tolerance of a particular plant changes as the growing conditions change. A blight may be but a local infection easily controlled; on the other hand it can attack particular plants in a whole region or nation. An example is the blight which killed virtually every chestnut tree in North America. Another is the famous potato blight in Ireland in the last century. As a result of that, it was estimated that one million people died of starvation and related ailments. Plant pathologists have made remarkable strides in identifying the pathogens of the various diseases. Bacteria may invade a plant through an infestation of insect parasites carrying the pathogen. A plant can also be inoculated by man. Other diseases might be caused by fungus which attacks the plant in the form of a mold or smut or rust. Frequently such a primary infection8 will weaken the plant so that a secondary infection may result from9 its lack of tolerance. The symptoms shown may cause an error in diagnosis, so that treatment may be directed toward bacteria which could be the result of a susceptibility caused by a primary virus infection.

单选题After his military defeat in 1865, Robert E. Lee entreated the people of the South to work for national harmony.

单选题Most Adults in US Have Low Risk of Heart Disease More than 80 percent of US adults have a less than 10-percent risk of developing heart disease in the next 10 years, according to a report in the Journal of the American College of Cardiology. Just 3 percent have a risk that exceeds 20 percent. "I hope that these numbers will give physicians, researchers, health policy analysts, and others a better idea of how coronary heart disease is distributed in the US population, " lead author Dr. Earl S. Ford, from the Centers for Disease Control and Prevention in Atlanta, said in a statement. The findings are based on analysis of data from 13,769 subjects, between 20 and 79 years of age, who participated in the Third National Health and Nutrition Examination Survey from 1988 to 1994. Overall, 82 percent of adults had a risk of less than 10 percent, 15 percent had a risk that fell between 10 to 20 percent, and 3 percent had a risk above 20 percent. The proportion of subjects in the highest risk group increased with advancing age, and men were more likely than women to be in this group. By contrast, race or ethnicity had little effect on risk distributions. Although the report suggests that most adults have a low 10-year risk of heart disease, a large proportion have a high or immediate risk, Dr. Daniel S. Berman, from Cedars-Sinai Medical Center in Los Angeles, and Dr. Nathan D. Wong, from the University of California at Irvine, note in a related editorial. Aggressive treatment measures and public health strategies are needed to shift the overall population risk downward, they add.

单选题But inthe end he approved of our proposal.

单选题Appealing to these expectations, Obama told Americans what they want to hear. People with insurance won't be required to change plans or doctors; they'll enjoy more security because insurance companies won't be permitted to deny coverage based on "pre - existing conditions" or cancel policies when people get sick. All Americans will be required to have insurance, but those who can't afford it will get subsidies. As for costs, not to worry. "Reducing the waste and inefficiency in Medicare and Medicaid will pay for most of is plan. " Obama said. He pledged to" not sign a plan that adds one dime to our [budget] deficits- either now or in the future. "If you believe Obama, what's not to like? Universal insurance. Continued choice. Lower costs. The problem is that you can't entirely believe Obama. If he were candid - if we were candid - we'd all acknowledge that the goals of our ideal health - care system collide. Perhaps we can have any two, but not all three. If we want universal insurance and unlimited patient and doctor choice, costs will continually spiral upward, because there will be no reason or no one to stop them. We have a variant of that today -a cost -plus system, with widespread insurance and open -ended reimbursement. Higher costs push up premiums and taxes. That's one reason health spending has gone from 5 percent of gross domestic product in 1960 to 16 percent in 2007. (Other reasons: new technologies, rising incomes. ) But controlling spending requires limits on patients and doctors. What is the author's attitude towards Obama's reform plan on health- care?A. Welcome.B. Critical.C. Indifferent.D. Approvin

单选题He has exhibited symptoms of anxiety and overwhelming worry.

单选题She stood there, crying and {{U}}trembling{{/U}} with fear.

单选题HIV can be safely used to cure cancer only if the deadly genes have been removed.

单选题He keeps himself fit by running 5 miles every day.A. healthyB. tiredC. energeticD. athletic

单选题American Sports The United States is a sports-loving nation. Sports in America take a variety of forms: organized competitive struggles, which draw huge crowds to cheer their favorite team to victory; athletic games, played for recreation anywhere sufficient space is found; and hunting and fishing. Most sports are seasonal, so that what is happening in sports depends upon the time of year. Some sports are called spectator sports, as the number of spectators great exceeds the number playing in the game. Baseball is the most popular sport in the US. It is played throughout the spring and summer, and professional baseball teams play well into the fall. Although no other game is exactly like baseball, perhaps the one most nearly like it is the English game other game of cricket. Football is the most popular sport in the fall. The game originated as a college sport more than 75 years ago. It is still played by almost every college and .university in the country, and the football stadiums of some of the largest universities seat as many as 80, 000 people. The-game is not the same as European football or soccer. In American football there are 11 players on each team, and they are dressed in padded uniforms and helmets because the game is rough and injuries are likely to occur. Basketball is the writer sport in American schools and colleges. Like football, basketball originated in the US and is not popular in other countries. Many Americans prefer it to football because it is played indoors throughout the winter and because it is a faster game. It is a very popular game with high schools, and in more than 20 states, state-wide high school matches are held yearly. Other spectator sports include wrestling, boxing; and horse racing. Although horse-racing fans call themselves sportsmen, the accuracy of term is questionable, as only the jockeys who ride the horses in the races can be considered athletes. The so-called sportsmen are the spectators, who do not "assemble" primarily to see the horse race, but to bet upon the outcome of each race. Gambling is the attraction of horse racing.

单选题Look After Your Voice Often speakers at a meeting experience dry mouths and ask for a glass of water. You can solve the problem by activating the saliva in you mouth. First gently bite the edges of your tongue with your teeth. Or press your entire tongue to the bottom of your mouth and hold it there until the saliva flow. Or you can imagine that you are slicing a big juicy lemon and sucking the juice. Before you begin your talk, be kind to your voice. Avoid milk or creamy drinks which coat your throat. Keep your throat wet by drinking a little sweetened warm tea or diluted fruit juice. If you sense that your are losing your voice, stop talking completely. Save your voice for your speech. You may feel foolish using paper to write notes, but the best thing you can do is to rest your voice. If you need to see a doctor, perhaps you can get some advice from a professional singer. In the meantime, do not even talk in a low voice. What about drinking alcohol to wet your throat? I advice you not to touch alcohol before speaking. The problem with alcohol is that one drink gives you a little confidence. The second drink gives you even more confidence. Finally you will feel all-powerful and you will feel you can do everything, but in fact your brain and your mouth do not work together properly. Save the alcohol until after you finish speaking. Perhaps you want to accept the advice, but you may wonder if you can ever change the habits of a lifetime. Of course you can. Goethe, who lived before indoor skating rinks or swimming pools, said, "We learn to skate in the summer and swim in the winter. "Take this message to heart and give yourself time to develop your new habits. If you are willing to change, you will soon be able to say that you will never forget these techniques because they became a part of your body.