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[单选题]
化脓性中耳炎与非化脓性中耳炎的区别为( )
A
a 前者有耳痛感觉，后者没有，而表现为听力障碍b 前者需要尽早就医，后者则没必要c 前者表现为听力障碍，后者则无听力障碍d 前者没有耳痛感觉，但有耳道流脓的症状
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A
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5.《老子》的语言特点是
2.
1.The sun sends out huge amounts of energy, not only to Earth, but to all other planets in the solar system and directly into space. The source of all that energy is nuclear fusion (核聚变) occurring at the sun’s core. The Large Helical Device being developed at the Ministry of Educational Institute for Fusion Science (NIFS) is essentially an “artificial sun” that aims to reproduce this nuclear fusion on Earth.“Nuclear fusion is a reaction in which nuclei of light atoms such as hydrogen combine to form nuclei of heavier atoms such as helium (氦). If we can utilize the huge amounts of energy released by this reaction, nuclear fusion will then constitute a completely new, clean and never ending source of energy,” says NIFS Director Atsui Iiyoshl. In many respects, fusion is far superior to the various conventional energy sources currently in use.Fusion seems to have tremendous potential as a new source of energy. But to produce fusion reactions on Earth, it is necessary to meet a set of critical plasmatic (等离子区) conditions, including ultra-high temperatures of 100 million degrees or so centigrade - a state that refuses to imagine. To meet this challenge, Japanese scientists have come up with their own unique helical device that is particularly safe and is suitable for continuous operation.The large Helical Device now being developed is expected to be completed by the end of next year, with experiments scheduled to start at the beginning of 1998.(5分)1.1The phrase “artificial sun” in the first paragraph probably means “________”.(1分)A. a man-made sun B. NIFSC. the sun’s energyD. fusion science
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权益回报属绩效测量指标中的( )
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5．“龙生龙凤生凤”，“种瓜得瓜种豆得豆”，有什么样的老子就有什么样的儿子，反映了生物的
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13.维果茨基的“最近发展区”概念的内涵表明（ ）
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