| Successful innovations have driven many
older technologies to extinction and have resulted in higher productivity,
greater consumption of energy, increased demand for raw materials, accelerated
flow of materials through the economy and increased quantities of metals and
other substances in use per person. The history of industrial development is
full of examples. In 1870, homes and mules were the prime source of power on U.S. farms. One horse or many decades. At that time, had a national commission been asked to forecast the horse and mule population for 1970, its answer probably would have depended on whether its consultants were of an economic mm of mind. Had they been "economists", they would have recognized that the power of steam had already been harnessed to industry and to land and ocean transport. They would have recognized further that would be A. Older technologies die away. B. The quality of life is improved. C. Overall productivity increases. D. More raw materials become necessary. [单项选择]Successful innovations have driven many older technologies to extinction and have resulted in higher productivity, greater consumption of energy, increased demand for raw materials, accelerated flow of materials through the economy and increased quantities of metals and other substances in use per person. The history of industrial development is full of examples.
In 1870, horses and mules were the prime source of power on U. S. farms. One horse or mule was required to support four human beings—a ratio that remained almost constant for many decades. At that time, had a national commission been asked to forecast the horse and mule population for 1970, its answer probably would have depended on whether its consultants were of an economic turn of mind. Had they been "economists", they would have recognized that the power of steam had already been harnessed to industry and to land and ocean transport. They would have recognized further that would be only a matter of time before steam w A. Older technologies die away. B. The quality of life is improved. C. Overall productivity increases. D. More raw materials become necessary. [填空题]Many people went shopping yesterday.
There were many people ______ yesterday.
[填空题]
Trip Reports Many companies require their employees to hand in reports of their business trips．A trip report not only provides a written record of a business trip and its activities, but also enables many employees to benefit from the information one employee has gained． Generally, a trip report should be in the form of a memorandum(内部通知), addressed to your immediate boss. The places and dates of the trip are given on the subject line. The body of the report will explain why you made the trip, whom you visited, and what you did. The report should give a brief account of each major event. You needn’t give equal space to each event Instead, you should focus on the more important events. Follow the body of the report with a conclusion． A trip Report Reported by：an employee back from a business trip Addressed to：his or her immediate (46) Used for： 1．serving as a written recor [简答题]
There are many innovations turning up in the latest experimental and production electric cars, affecting everything from batteries to motors to control systems. The need to make them all work together is prompting a complete rethink about the way cars should be designed and manufactured, and it is unclear which technologies will dominate as the constraints imposed by internal combustion engines give way to the new limits and possibilities associated with electric propulsion. (46) But one group of engineers have stuck their necks out and declared that a particular technology, the electric hub motor, is likely to become the most widely used drive system. 我来回答: 提交
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