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当前学科：呼吸系统
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患者男，65岁。吸烟40余年，慢性咳嗽、咳痰20余年。近2年来劳累时有气急。查体：两肺呼吸音减弱，肺下界下移。两肺底有细小湿啰音。最可能的诊断是（）
A . 大叶性肺炎
B . 肺气肿
C . 胸腔积液
D . 支气管哮喘
E . 气胸
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推荐知识点:
300 Hurdles Now comes the first hurdle. __1__ We all make it over this hurdle with ease. This symbolizes. Those obstacles in life that we struggle to get over, but we always manage to do so. You can look at that hurdle in two ways: "I can’t make it over, I’m too tired" or "I am one more hurdle closer to finishing this race". This is an example of taking a negative situation and seeing something positive in it. The next part of the race is every hurdle between the first and last one. __2__ This happens a lot in life too. There may be a situation that arises where you feel as though you can’t make it and all you can think about is giving up. You may fall over that "hurdle" or struggle getting over it, but somehow you find it in yourself to jump over it and move on with the race. Next is that last 100m of the race. You feel as though you just want to say, "No I can't do this." __3__. Now lastly is the last hurdle. This hurdle is the toughest out of all of them. In life we find ourselves falling and falling, and maybe getting too lost in our problems that we fell like have been though enough and there’s no hope. __4__ It's one step close to the end of the race. Once you finish, you look back on it and you realize that you made it not by leaping, but step by step. "Yard by yard, life is very hard. But inch by inch, life can be a cinch."__5__. __5__内应选（）
韶山3型电力机车工艺轮对上的大齿轮与小齿轮之间的侧隙应为（）。
关于硫及硫醇在石油馏分别的分布，下述说法不正确的是：（）
下列继发性补体降低的情况，属于补体合成不足的是（）.
关于人身权与财产权之间的联系，正确的有（）。
普查不能实现（）
受力钢筋的加工误差不允许超过（）毫米。
阻塞性黄疸（）
位于杭州湾北缘的岛屿有（）。
四个选项中，（）是事故处理“四不放过”原则之一。