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题目：
单选题
A胎儿心脏
B心脏瓣膜
C正常的心肌组织
D静止不动的肝组织
E血流
答案：
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简述服务蓝图的结构、作用、制作步骤。
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《纪念白求恩》的作者和写作时间是（）
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Lainey finished third grade. She had good grades and could read grade level, but she did not like to read. On a family car trip, her Aunt Dede pulled out a copy of Harry Potter, as a surprise for her . But Lainey took one look at it, her eyes, and said, “ Borring !”Aunt Dede, a teacher, had read the book to her students, and they loved it. the youngest children in the class were by the story. They with great interest and then joined in grand conversations about Harry`s adventures.“How can you say it`s ? Have you read it? ” asked Aunt Dede.“No, it`s too long and it doesn`t have any .” complained Lainey.“Oh, that`s where you are ;there are lots of pictures. Every page is full of pictures; you just have to read the words to them. It`s like magic.”“Nice try , Aunt Dede,”Lainey replied from the back seat.Another was in order. “Well, if you don’t want to read it, give it .Maybe your mom would hearing the story.” The book sailed through the air to Aunt Dede and she began to read it aloud. By the end of the first chapter, were coming from the back seat:“Please read a little .”Lainey is an example of an reader. As shown here, Lainey can become about reading when with literature on topics that interest her, and when the people around her model involvement in the reading process.
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2012年6月，湖北省作协文学院和恩施市政府联合举办了“湖北作家看恩施”采风活动。作家们通过自己的文学生动记录了恩施经济社会协调发展、人民安居乐业和谐幸福的生活，创作出了许多富有生命力的文章。作家进行文学采风活动是因为（）①社会实践是文化创新的源泉和动力②文艺工作者需要向人民群众虚心学习③文化创新可以推动社会实践的发展④文艺工作者历来是文化创造的主体
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下列哪一因素最能引起肺泡-动脉二氧化碳分压差增大（）
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迷路炎按病变范围及病理变化可分为（）。
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锅炉介质的流动动力主要是来自水泵的压力。
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接地网上任意保护接地点测得的接地电阻值不得大于（）Ω。
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患者，男，69岁，诊断"慢性支气管炎，阻塞性肺气肿"，现痰多，难咳出，对其进行排痰训练，不包括的方法是（）。
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真空下降的处理原则是什么？