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Pressure Cooker(压力锅) Safety When you are cooking with a pressure cooker, you should learn a few common sense(常识) rules:1. Never leave the cooker unwatched when it is in use.2. Add sufficient liquid but never past the recommended fill point. Overfilling the cooker may block the vent pipe(排气孔) and cause the cooker to explode.3. Set the cooking time. Too much time may overcook the food or too much pressure may build up in the cooker. Too little time will lead to undercooked food.4. If you are new to pressure cooking, follow the cooking instructions carefully. Heat and time can either result in a great meal or a ruined one.5. Never try to force a pressure cooker cover open. Allow the cooker to cool or run it under cool water before trying to open the cover.6. Clean the cooker thoroughly after each use. Mild detergent(洗涤剂) and hot water work the best. Do not use stove ash or sand for they may damage the cooker. The gasket(密封圈) is best cleaned in warm soapy water and then dried. Store the gasket in the bottom of the pot. According to the instructions, which of the following is TRUE
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Is it in that factory ______ "Red Flag" cars are produced
A — filing cabinet B — executive desk C — push-button telephone D — computer terminal E — printing room F — duplicating paper G — specialist H — buyer’s representative I — seller’s representative J — contract K — catalogue L — document M — business negotiation N — salesman O — reception office P — export commodities fair Q — general manager R — foreign businessman S — signing a business contract T — sample ______ 复印纸 ______ 文件柜
She’s busy ______ out the wedding invitation.
Passage Two Every living thing has an inner biological clock that controls behavior. The clock works all the time even when there are no outside signs to mark the passing of time. The biological clock tells plants when to form flowers and when the flowers should open. It tells insects when to leave the protective cocoon and fly away. And it tells animals when to eat, sleep and wake. It controls body temperature, the release of some hormones and even dreams. These natural daily events are circadian rhythms. Man has known about them for thousands of years. But the first scientific observation of circadian rhythms was not made until 1729. In that year French astronomer, Jean-Jacques d’Ortous de Mairan, noted that one of his plants opened its leaves at the same time every morning, and closed them at the same time every night. The plant did this even when he kept it in a dark place all the time. Later scientists wondered about circadian rhythms in humans. They learned that man’s biological clock actually keeps time with a day of a little less than 25 hours instead of the 24 hours on a man-made clock. About four years ago an American doctor, Eliot Weitzman, established a laboratory to study how our biological clock works. The people in his experiments are shut off from the outside world. They are free to listen to and live by their circadian rhythms. Dr. Weitzman hopes his research will lead to effective treatments for common sleep problems and sleep disorders caused by aging and mental illness. The laboratory is in the Monteflore Hospital in New York City. It has two living areas with three small rooms in each. The windows are covered, so no sunlight or moonlight comes in. There are no radios or television receivers. There is a control room between the living areas. It contains computers, one-way cameras and other electronic devices for observing the person in the living area. The instruments measure heartbeat, body temperature, hormones in the blood, other substances in the urine and brain waves during sleep. A doctor or medical technician is on duty in the control room 24 hours a day during an experiment They do not work the same time each day and are not permitted to wear watches, so the person in the laboratory has no idea what time it is. In the first four years of research, Dr Weitzman and his assistant have observed 16 men between the ages of 21 and 80. The men remained in the laboratory for as long as six months. Last month, a science reporter for The New York Times newspaper, Dava Sobol, became the first woman to take part in the experiment. She entered the laboratory on June 13th and stayed for 25 days. Miss Sobol wrote reports about the experiment during that time, which were published in the newspaper. In his observation, the French scientist noticed that the leaves of a certain plant maintained its opening-and-closing cycles ______.
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