单选题France has kept Uintimate/U links with its former African territories.

单选题Below 600 feet ocean waters range from dimly lit to completely dark.

单选题Her figure was slender and graceful, her features good.A. feebleB. lovelyC. beautifulD. pleasant

单选题 Hypertension Drugs Found to Cut Risk of Stroke Australian doctors declared Monday that a cocktail of simple antihypertensive drugs can lower the risk of patients suffering a repeat stroke by more than a third. This is the result of their research. The research, presented at a medical conference in Italy over the weekend, has been valued highly as a major breakthrough in stroke prevention. Strokes kill 5 million people a year, and more than 15 million suffer non-fatal strokes that often leave them with useless limbs, slurred speech and other serious disabilities. One in five stroke survivors goes on to have a second, often fatal, stroke within five years of the first. An international six-year study of 6,100 patients directed from Sydney University found that by taking two blood pressure-lowering drugs, the risk of secondary strokes can be reduced by up to 40 percent. Even taking one of the commonly available drugs can cut the risk by a third, the study said. The drugs are the diuretic indapamide (吲达帕胺)and the ACE inhibitor perindopril, better known by its brand name Coversyl. The combination was effective even in patients who did not have high blood pressure, the researchers said. They even found that the risk of another stroke could be cut by three quarters among the one-in-ten patients who had suffered a cerebral hemorrhage (出血), the worst type of stroke, where there is direct bleeding into the brain. Stephen McMahon, who presented the research at the Milan congress of the European Society of Hypertension, said about 50 million people were alive who had suffered at least one stroke. "If most of those patients were able to get access to this treatment, it would result in maybe the avoidance of half a million strokes a year," the professor told Australia's ABC Radio. McMahon said doctors had long known that lowering the blood pressure of those with hypertension could help prevent strokes. "What we have shown for the first time is that it does not really matter what your blood pressure is; if you have had a stroke, then lowering blood pressure will produce large benefits, to begin with—even for people whose blood pressure is average or below average," he said. McMahon said the Milan gathering had heralded the research as a "major breakthrough in the care of patients with strokes—perhaps the biggest step forward that we have made in the last couple of decades."

单选题Canada will prohibit smoking in all offices this year.

单选题We had a very {{U}}awful{{/U}} earthquake here last year.

单选题Let's set up a meeting with other parents, so everyone can learn ways to make water safer for our children to drink.A. raiseB. establishC. haveD. erect

单选题Sydney is home to nearly 4.4 million people...The 57 square kilometer harbour is one of the largest in the world, and famous for the unmistakable 134 metres high arch of the Harbour Bridge and the graceful sails of the Opera House. It is a busy waterway with ferries, freighters, hydrofoils and pleasure craft. Sydney Harbour is the largest in the world.A. RightB. WrongC. Not Mentioned

单选题 Deaths Associated with Sugary Soft Drinks Sugar-sweetened sodas, sports drinks and fruit drinks may be associated with about 180,000 deaths around the world each year, according to a recent research. Sugar-sweetened beverages are consumed throughout the world, and contribute to excess body weight, which increases the risk of developing diabetes, cardiovascular diseases and some cancers. Using data collected as part of the 2010 Global Burden of Diseases Study, the researchers linked intake of sugar-sweetened beverages to 133,000 diabetes deaths, 44,000 deaths from cardiovascular diseases and 6,000 cancer deaths. Seventy-eight percent of these deaths due to over-consuming sugary drinks were in low and middle-income countries, rather than high-income countries. "In the U.S., our research shows that about 25,000 deaths in 2010 were linked to drinking sugar-sweetened beverages," said Mr. Singh, a postdoctoral research fellow at the Harvard School of Public Health in Boston. Of nine world regions, Latin America/Caribbean had the most diabetes deaths (38,000) related to the consumption of sugar-sweetened beverages in 2010. Japan, one of the countries with lowest per-capita consumption of sugary beverages in the world, had the lowest death rate associated with the consumption of sugary beverages, at about 10 deaths due to per million adults. "Because we were focused on deaths due to chronic diseases, our study focused on adults. Future research should assess the amount of sugary beverage consumption in children across the world and how this affects their current and future health," Singh said. The American Heart Association recommends adults consume no more than 450 calories per week, from sugar-sweetened beverages, based on a 2,000-calorie diet and offers tips to help you make better lifestyle choices and eat healthier.

单选题The document was compiled by the Department of Health.

单选题After his wife and children died, Paul turned to his work to

单选题We tried to restrict our conversation to arguments relevant to the topic.

单选题We must abide by the rules.

单选题{{B}}第三篇{{/B}} {{B}}Need for Emphasis on Treatment{{/B}} AIDS programs in developing countries put too little emphasis on treatment, the World Health Organization said Tuesday, asking for more small community-based clinics to be opened to treat HIV-infected people. An estimated 36 million to 46 million people are living with AIDS, two-thirds of them in Africa, but only 440,000 people in developing countries were receiving treatment by the end of 2003, the UN health agency said in its annual report. "Without treatment, all of them will die a premature and in most cases painful death," the WHO said in the 169-page World Health Report. WHO Director General Lee Jong-wook said community-based treatment should be added to disease prevention and care for sufferers in AIDS programs. "Future generations will judge our time in large part by our response to the AIDS disease," Lee said. "By tackling it decisively we will also be building health systems that can meet the health needs of today and tomorrow. This is a historic opportunity we cannot afford to miss," he added. Antiretroviral drugs enable people hit by AIDS to live longer. The annual cost of treatment, which was about $10,007 when the drugs were first developed, has dropped to about $150. Treatment programs also help AIDS prevention efforts, the report said, citing great demands for testing and counseling where treatment has been made available. Good counseling in turn leads to more effective prevention in those who are uninfected, and significantly reduces the potential for HIV carriers to pass on the infection, the report said. Since its discovery in the 1980s, more than 20 million have died of AIDS, mostly in poor countries.

单选题Computer mouse The basic computer mouse is an amazingly clever invention with a relatively simple design that allows us to point at things on the computer and it is very productive. Think of all the things you can do with a mouse like selecting text for copying and pasting, drawing, and even scrolling on the page with the newer mice with the wheel. Most of us use the computer mouse daily without stopping to think how it works until it gets dirty and we have to learn how to clean it. We learn to point at thing before we learn to speak, so the mouse is a very natural pointing device. Other computer pointing devices include light pens, graphics tablets and touch screen, but the mouse still our workhorse. The computer mouse was invented in 1964 by Douglas Englehart of Stanford University. As computer screens became popular and arrow keys were used to more around a body of text, it became clear that a pointing device that allowed easier motion through the text and even selection of text would be very useful. The introduction of the mouse, with the Apple Lisa computer in 1983, really started the computer public on the road to relying on the mouse for routine computer tasks. How does the mouse work? We have to start at the bottom, so think upside down for now. It all starts with mouse ball. As the mouse ball in the bottom of the mouse rolls over the mouse pad, it presses against and turns two shafts. The shafts are connected to wheels with several small holes in them. The wheels have a pair of small electronic light-emitting devices called light emitting diodes (LED) mounted on either side. One LED sends a light beam to the LED on the other side. As the wheels spin and a hole rotates by, the light beam gets through to the LED on the other side. But a moment later the light beam is blocked until the next hole is in place. The LED detects a changing pattern of light, converts the pattern into an electronic signal, and sends the signal to the computer through wires in a cable that goes out the mouse body. This cable is the tail that helps give the mouse its name. The computer interprets the signal to tell it where to position the cursor on the computer screen. So far we have only discussed the basic computer mouse that most of you probably have or have used. One problem with this design is that the mouse gets dirty as the ball rolls over the surface and picks up the dirt. Eventually you have to clean your mouse. The newer optical mice avoid this problem by having no moving parts.

单选题Is the News Believable? Unless you have gone through the experience yourself, or watched a loved one's struggle, you really have no idea just how desperate cancer can make you. You pray, you rage, you bargain with God, but most of all you clutch at any hope, no matter how remote, of a second chance at life. For a few excited days last week, however, it seemed as if the whole world was a cancer patient and that all humankind had been granted a reprieve (痛苦减轻). Triggered by a front-page medical news story in the usually reserved New York Times, all anybody was talking about — on the radio, on television, on the Internet, in phone calls to friends and relatives — was the report that a combination of two new drugs could, as the Times put it, "cure cancer in two years." In a matter of hours patients had jammed their doctors' phone lines begging for a chance to test the miracle cancer cure. Cancer scientists raced to the phones to make sure everyone knew about their research too, generating a new round of headlines. The time certainly seemed ripe for a breakthrough in cancer. Only last month scientists at the National Cancer Institute announced that they were halting a clinical trial of a drug called tamoxifen (他莫昔芬) — and offering it to patients getting the placebo (安慰剂) — because it had proved so effective at preventing breast cancer (although it also seemed to increase the risk of uterine (子宫的) cancer). Two weeks later came the New York Times' report that two new drugs can shrink tumors of every variety without any side effects whatsoever. It all seemed too good to be true, and of course it was. There are no miracle cancer drugs, at least not yet. At this stage all the drug manufacturer can offer is some very interesting molecules, and the only cancers they have cured so far have been in mice. BY the middle of last week, even the TV talk-show hosts who talked most about the news had learned what every scientist already knew: that curing a disease in lab animals is not the same as doing it in humans. "The history of cancer research has been a history of curing cancer in the mouse," Dr. Richard Klausner, head of the National Cancer Institute, told the Los Angeles Times. "We have cured mice of cancer for decades — and it simply didn't work in people./

单选题The full economy {{U}}round-trip{{/U}} is ＄ 273.

单选题This is not typical of English, but is a feature of the Chinese language.

单选题Could you please tell me your standards when selecting a candidate? A. opinions B. criterion C. criteria D. understanding

单选题People from many countries were Udrawn/U to the United States by the growing cities and industries.