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什么是双母线带旁路接线?有何特点?
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进行电焊前应作哪些准备工作?
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Artist, scientist and entrepreneur are what most of us have known some or a lot about.【C1】______people would be surprised if somebody is perfectly good at one or two of these professions,【C2】______a hat-trick(帽子戏法)is quite rare. Man-kit Lam, now【C3】______in Hong Kong, in his 50s is the inventor of "special painting style", an accomplished【C4】______professor and biologist, and a rising key man with businesses in【C5】______the United States and Hong Kong. But Lam is most【C6】______as an artist, which is his passion(热望)since childhood. Lam was born in Chaoyang in South Chinas Guangdong Province and【C7】______with his family to Hong Kong【C8】______he was a child. A strong art lover, Lam displayed unusual artistic talents when he studied traditional Chinese ink painting【C9】______experienced and artistic Johnson Chou, Zhao Shaoang and Yang Shanshen in his【C10】______years. When he graduated from middle school, Lam asked his【C11】______to let him study art in college. They strongly objected, fearing that it would be too【C12】______for him to survive as a professional artist. "So I chose to study mathematics in college because it seemed to be the【C13】______to learn," Lam said. "To study【C14】______, you had to write papers. To study physics or biology, you【C15】______conduct experiments. But to study mathe matics, you only had to understand. " The young man had not【C16】______that he had special ability in science. After only six years of study in Canada, Lam got a bachelors degree in mathematics, a masters degree【C17】______physics and a doctorate in biophysics, the latter from the University of Toronto. In 1977, Lam went to the Baylor College of Medicine in Houston as an associate professor of ophthalmology(眼科学). In 1980, Lam was【C18】______to be the founding director of the Hong Kong Institute of Biotechnology, thus beginning his frequent shuttles(往返)between the United States and Hong Kong. In 1993, Lam【C19】______the Life Tech Group of Companies in the United States to develop, manufacture and market healthcare products. After Hong Kongs【C20】______to the motherland, Lam moved the headquarters of life Tech Group to Hong Kong and has lived there ever since.【C1】A.SomeB.ManyC.FewD.Lots of
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电焊工应备有下列()防护用具。
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当平均气温在()或最低气温在()时,浇筑混凝土应采取冬季作业。
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喷墨打印机的墨水,主要的色彩是()
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以下关于病毒性肝炎流行特征的描述正确的是()
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工业中表征聚丙烯等规度一般用()表示。
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车站值班员接到邻站列车预告后如何办理?
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男性,4岁,左膝内侧肿胀,轻度跛行3个月,仍能玩耍。X线摄片诊断左股骨内髁部单纯骨结核,即给予抗结核治疗。3天前患儿左膝扭伤后,突然肿胀,疼痛,活动受限,伴有高热及寒战,血白细胞总数11×109/L,中性粒细胞60%,最可能的诊断为()