Sprained (扭伤）Ankle One of the most common injuries teenagers and adults experience is a sprained ankle. A sprain occurs when the ligaments (韧带）of a joint are twisted (扭伤）and possibly torn. Ligaments are bands of fibers that hold the bones of a joint in position. A sprain can occur from a sudden twisting at the joint，or a stretching or tearing of the fibers of the ligaments. The injured area usually swells (肿胀）and becomes black and blue. Stepping off the sidewalk at the wrong angle or having one foot land in a hole while walking or running can leave you rolling on the ground in pain with an antde on fire! If you cannot walk without experiencing intense pain，you must seek medical help. If the pain is manageable，and you can walk，here are three words to help you remember how to treat yourself: ■Elevate (抬高） ■ Cool ■ Bandage (打绷带) As soon as there is injury to that ligament, there will be a certain amount of bleeding under the skin. Once the blood pools around the damaged blood vessels，swelling occurs. The pressure from the swelling results in additional stress and tendemess to the region. In order to reduce the degree of swelling，lie down as soon as possible and keep the ankle elevated so that it is actually higher than your heart. Next，to reduce blood distribution and keep bleeding (流血） to a minimum，apply a cold pack. After 20 mhiutes，take the pack off，wait half an hour，and then reapply. This can be done several times a day for a total of three days. Never leave a cold pack on for more than 20 minutes at a time. Reducing the temperature in that area for an extended period of time signals the body to increase blood flow to raise the body temperature! Therefore，one accidentally triggers (引起）more blood distribution to the affected area by leaving a cold pack on for too long! Finally, bandage the ankle. Be careful not to wind it too tightly; doing so can restrict blood flow and cause harm to the entire foot. 36 A sprain is caused by

单选题Food Safety and Foodborne Illness Food safety is an increasingly important public health issue. Governments all over the world are intensifying their efforts to_______ (51) food safety. These efforts are in response to an increasing number of food safety problems and_______ (52) .consumer concems. Foodbome illnesses are defined as diseases, usually either infectious or toxic （有毒的） in nature，caused by agents that_______ (53) the body through the ingestion （摄取）of food. Every person is _______ (54) risk of foodbome illnesses. Foodbome diseases are a widespread and growing public health_______ (55)，both in developed and developing countries. The global incidence of foodborne diseases is difficult to ______ (56)，but it has been reported that in 2005 alone 8 million people died from diarrhoeal （腹泻）diseases. A great proportion of these ______ (57) can be attributed to contamination （污染）of food and drinking water. Additionally，diarrhoea is a _______ (58) cause of malnutrition （替养不良）in ihfants and young children. In industrialized countries，the percentage of the population suffering from foodbome diseases each year has been ___ (59) to be 10% up to 30%.In the United States of America，for example, around 76 million cases of foodbome diseases，resulting _____ (60) 325,000， hospitalizations and 5,000 deaths，are estimated to occur each year. _______ (61) less well documented，developing countries bear the brunt （首当其冲）of the problem due to the presence of a wide _______ (62) of foodbome diseases，including those caused by parasites （寄生虫）. The high prevalence of diarrhoeal diseases in many developing countries suggests major_______ (63) food safety problems. In partnership with other stakeholders，WHO is developing_______ (64) that will further promote the safety of food. These policies (65) the entire food chain from production to consumption and will make use of different types of expertise （专长）.

单选题He may not be so clever as Peter,but he is as industrious as can be.

单选题Good Table Manners Manners play an important part in making a favorable impression at the dinner table. Here are some general rules ： Napkin (餐巾）use The meal begins when the host unfolds his or her napkin. This is your signal to do the same, so place your napkin on your lap. Unfold it completely if it is a small napkin, or in half, lengthwise (纵向地），if it is a large dinner napkin. If you need to leave the table during the meal，place your napkin on your chair as a signal to your server that you will be returning. Once the meal is over, place your napkin neatly on the table to the right of your dinner plate. Do not refold it. Use a napkin only for your mouth. Never use it for your nose, face or forehead. Use of utensils (餐具） Start with the knife, fork or spoon furthest from your plate, and work your way in, using one utensil for each course. If soup is served, remember to spoon away from yourself. This helps stop the drips. Do not put the entire soup spoon in your mouth. Instead, fill a soup spoon about 75 per cent with soup, and sip (曝饮）it from the side noiselessly. After finishing dinner, place the knife and fork parallel to one another across the plate with the knife blade facing inward toward the plate. Using your fingers Here，s a list of finger foods： sandwiches, cookies, small fruits or berries with stems, French fries and potato chips, and hamburgers. Chew with your mouth closed and don，t make noise ； don’t talk with your mouth full. Bread must be broken with your hands. It is never cut with a knife. Don’t pick something out of your teeth. Instead, excuse yourself to the bathroom. If possible, try not to cough at the table. Do not put your elbows (M) on the table. In France, it is essential to have both hands above the table at the same time. Do not put bones or anything else on the table. Things that are not eaten should be put on your plate. Which of the following shows good table manners?

单选题Clinical Trials 1 Many clinical trials are done to see if a new drug or device is safe and effective for people to use. Sometimes clinical trials are used to study different ways to use the standard treatments so they will be more effective, easier to use, and/or decrease side effects. Sometimes, studies are done to learn how to best use the treatment in a different population, such as children, in whom the treatment was not previously tested. 2 It is important to test drugs and medical products in the people they are meant to help. It is also important to conduct research in a variety of people because different people may respond differently to treatments. Some people participate in clinical trials because they have exhausted standard treatment options. Other people participate in trials because they want to contribute to the advancement of medical knowledge. 3 The FDA (食品及药物管理局）works to protect participants in clinical trials and to ensure that people have reliable information as they decide whether to join a clinical trial. Although efforts are made to control the risks to clinical trial participants，some risks may be unavoidable because of the uncertainty inherent (内在的）in medical research studies involving new medical treatments. 4 People should learn as much as possible about the clinical trials that interest them. They should also feel comfortable discussing their questions and concerns with members of the health care team. Prospective (预期的）participants should understand what happens during the trial, the type of health care they will receive, and any costs to them. Anyone considering a clinical trial should also know that there are benefits and risks associated with participating. Learn as much as you can about a clinical trial____

单选题This equipment can produce vivid images of the organs of the patient for doctors to analyze.

单选题The multi-story building,though not very tall,stood conspicuously among the century-old houses in the small city.

单选题The journalist was probing into several financial scandals.

单选题It is well known that fats spoil by becoming rancid.

单选题His eyes widened in surprise after hearing the news.