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大型尾机型船空载航行时，为减缓其纵向变形，在压载安排方面最好采取（）。
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转炉炼钢的主要反应是氧化反应。
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纪录电影大师（）曾经在中国拍摄了一批纪录片，例如：《四万万人民》、《早春》、《愚公移山》。
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为什么不以干球温度和相对湿度定作夏季空调室外计算参数，而采用干球和湿球两个参数？
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海上协会
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AC97软声卡和硬声卡的区别就在于软声卡的DSP处理部分是由CPU和驱动程序来完成
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治疗肾精薄弱证胎怯应首选的方剂是（）
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根据以下资料，回答题。The social sciences are flourishing.As of 2005,there were almost half a million professional social scientists from all fields in the world, working both inside and outside academia. According to the World Social Science Report 2010,the number of social-science students worldwide has swollen by about 11% every year since 2000.Yet this enormous resource in not contributing enough to today’s global challenges including climate change, security,sustainable development and health.(41)______Humanity has the necessary agro-technological tools to eradicate hunger , from genetically engineered crops to arificial fertilizers . Here , too, the problems are social: the organization and distribution of food, wealth and prosperity.(42)____This is a shame—the community should be grasping the opportunity to raise its influence in the real world. To paraphrase the great social scientist Joseph Schumpeter:there is no radical innovation without creative destruction .Today ,the social sciences are largely focused on disciplinary problems and internal scholarly debates,rather than on topics with external impact.Analyses reveal that the number of papers including the keywords “environmental changed” or “climate change” have increased rapidly since 2004,(43)____ When social scientists do tackle practical issues ,their scope is often local:Belgium is interested mainly in the effects of poverty on Belgium for example .And whether the community’s work contributes much to an overall accumulation of knowledge is doubtful. The problem is not necessarily the amount of available funding (44)____this is an adequate amount so long as it is aimed in the right direction. Social scientists who complain about a lack of funding should not expect more in today’s economic climate.The trick is to direct these funds better.The European Union Framework funding programs have long had a category specifically targeted at social scientists.This year,it was proposed that system be changed:Horizon 2020,a new program to be enacted in 2014,would not have such a category ,This has resulted in protests from social scientists.But the intention is not to neglect social science ; rather ,the complete opposite.(45)____That should createmore collaborative endeavors and help to develop projects aimed directly at solving global problems. 请在第____处填上正确选项。
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为什么柴油机冒黑烟并有发抖现象？
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依沙吖啶引产自给药到胎儿胎盘娩出需要的时间为（）