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设计时不宜采用提高焚烧温度的办法来缩短停留时间,而应从技术经济角度确定焚烧温度,并通过试验确定所需的停留时间,同样,也不宜片面地以延长停留时间而达到降低焚烧温度的目的
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在裂解气压缩过程中,除去了裂解气中全部的水和重烃。
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在分布式环境中实现身份认证可以有多种方案,以下选项中最不安全的身份认证方案是()。
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在“渠亦不自省其过,虽终老而不悔”中,“终老”之义为()
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鼓轮打磨深度进给量是通过()调节的
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根据《合同法》,下列变更中属于新要约的是()的变更。
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一台8个承重点的秤,应选用()最大秤量的标准砝码进行偏载测试.
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English has never been the only language in use over the British Isles , and it certainly is not now! Welsh is still used in Wales. Some Welsh people still speak it as their mother tongue , and it is widely taught in Welsh schools. Some people in Scotland and in Ireland still use a language that is related to Welsh. It is called Gaelic. These languages have a long history in these islands - longer than the history of English. In addition , people fromoverseas have settled in England quite recently during this century. In some industrial cities , though not generally in Britain , you find groups of people who speak Polish , and other groups speaking the languages of the Indian subcontinent. A survey of North London schools in the early 1980' s found that nearly a third of the children spoke a language other than English at home.The majority of the 55 million people living in England use English all the time. Standard English , that is , written English , is in use throughout Britain. Spoken English , however , sounds very different in different parts of the country. There is a story , a play. by the famous writer George Bernard Shaw , about a professor of English Language who can tell you someone' s address when he hears that person speak! That is exaggeration of course. Not even a Professor , who has studied the sounds of English all his life , can really do that. However ,it is true hat most people who have lived for a long time in Britain can tell a number of things about the people as soon as they speak! Usually we cannot tell the speaker' s address, but we can guess the part of the country where the person comes from. We can tell how well educated he or she is too! If an international user of English , like anyone of you here , happens to meet speakers from , say , the North or the West of England , you may find them hard to understand. Unless you understand what is going on your confidence in your ability to use the language may be badly shaken.36. Gaelic is related to Welsh. ( )37. Welsh is not taught in schools anymore. ( )38. One third of the 55 million people in England speak other languages besides English at home ( )39. Written English is in use throughout Britain but spoken English sounds different in different parts of the country. ( )40. Most people who have lived for a long time in Britain can tell how well educated a person is by the way he/ she speaks. ( )
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经至少连续20代的全同胞兄妹交配培育而成,品系内所有个体都可追溯到起源于第20代或以上代数的一对共同祖先的是:()
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患者,男,68岁。家属代诉:患者于今日下午外出散步,突然昏仆,不省人事,半身不遂,目合口张,鼻鼾息微,遗尿,汗出,四肢厥冷,脉细弱。治疗应首选()