Computers may one day turn night into day---with good old, natural sunlight. (1)Colossal computer-controlled mirrors, thousands of feet across, may one day orbit the earth, reflecting sunlight onto a darkened United States. (2)Some scientists say that 16 of these mirrors, each about a half mile across, could aim their reflected light at one area on the earth that was about 200 miles by 300 miles. That much light would equal about 56 moons. The mirrors would be so high that they could catch the sun’s light as it was shining on the other side of the earth. The mirrors could orbit-thousands of miles high-at the same speed as the earth turns on its axis(轴). That way, the mirrors would always be over the same spot. The aluminum-coated(涂铝的), plastic mirrors could be folded up and packed into a spaceship, according to the scientists. Once released a few hundred miles in space, the mirrors, powered by a solar-powered engine, could make the rest of the trip into space on their own. (3)The scientists say that the computer-controlled mirrors could also be made to tilt(倾斜) slowly, so the reflected sunlight would sweep slowly along the surface of the earth. For example, as night fell, the mirrors could be tilted to light up Boston. Later on, as darkness spread slowly westward, Chicago, for example, then San Francisco could be lit up. The reflected sunlight would allow these cities to save up electricity. And in emergencies, such as power-failures, the mirrors could light up the affected area. What no one knows yet is what effect this artificial daytime would have on plants, animals, and humans. Would it confuse some animals and harm plants that are used to regular day-night cycles? The scientists recommend that studies be done to find out what bad effects there might be.
写一封信:委托演讲,安排程序 1)你是人力开发部总经理王大伟,你写信给英国一位高级顾问亚当.史密斯先生,请他就“致力中国研究三十年”一题作一个演讲,他的地址如下: Cambridge Consultants 36 Queen Street London EC3V8ES United Kingdom 2)你们公司定于5月22至5月29日在公司总部召开‘国外管理阶层研讨会’, 3)如果史密斯先生同意,他的演讲暂定于5月22日(星期二)下午1点半至4点半。建议演讲持续90分钟,提问时间50分钟。 4)参加会议的还有来自五个国家的七个经理。 5)更详细的安排请参考随信附上的你的行程安排。
查看答案
LETTERHEAD April 14, 2000 Mr. Adam S. Smith Senior Advisor Cambridge Consultants 36 Queen Street London EC3V8ES United Kingdom Dear Mr. Smith It is indeed an honor for us to invite you to lecture in out Overseas Executive Program to be held at our head office from May 22 through May 29. The title we would like to propose for your lecture is “Thirty Years of Trying to Understand China.” The content should throw light on such things as the behavior of Chinese people and their way of thinking. We have tentatively (暂时地) scheduled your lecture for 13:30 to 16:00 on Tuesday, May 22 pending your approval, and would like to ask you to speak for 90 minutes and allow 50 minutes for questions from the participants. Better grasp of our corporate structure and activities. In so doing we hope to enhance their overall management skills. The group this time will consist of seven managers from five countries who are working with our overseas affiliates. Please refer to the enclosed list of participants for further details. Please indicate at your earliest possible convenience if the above schedule is acceptable. David Wang General Manager Human Resource Development