The development of economy

The ecosystem and human populations

The widespread and application of high technology

正确

错误

正确

错误

对于阶跃信号，中值滤波会改变信号的形状。

对与椒盐噪声，中值滤波比均值滤波能力强

对相距较远的窄脉冲干扰，中值滤波效果较好

信号经过中值滤波后，频谱基本不变

（3）

（3）

（3）

（3）

正确

错误

企业负责人

生产管理负责人

质量管理负责人

质量受权人

企业法定代表

正确

错误

正确

错误

pose

exaggerated

accelerating

extinct

exist

perception

wealthy

magnified

starving

head K. running L. predicted M. abundant N. conception O. reducing For many environmentalists, the world seems to be getting worse. They have developed a hitlist of our main fears: natural resources are ( 1_____ ) out?; the population is ever growing, leaving less and less to eat; species are becoming ( 2______ ) in vast numbers, and the planet's air and water are becoming ever more polluted. But a quick look at the facts shows a different picture. First, energy and other natural resources have become more ( 3________ ) not less so, since the book 'The Limits to Growth' was published in 1972 by a group of scientists. Second, more food is now produced per (4__________) of the world's population than at any time in history. Fewer people are ( 5_________ ) . Third, although species are indeed becoming extinct, only about 0.7% of them are expected to disappear in the next 50 years, not 25~50%, as has so often been ( 6________ ) . And finally, most forms of environmental pollution either appear to have been ( 7________ ) , or are transient - associated with the early stages of industrialization and therefore best cured not by restricting economic growth, but by ( 8_________ ) it. One form of pollution - the release of greenhouse gases that causes global warming - does appear to be a phenomenon that is going to extend well into our future, but its total impact is unlikely to ( 9_________ ) a devastating problem. A bigger problem may well turn out to be an inappropriate response to it. Yet opinion polls suggest that many people nurture the belief that environmental standards are declining and some factors seem to cause this disjunction between ( 10________ ) and reality.