咳嗽伴胸痛不常见于()
A.肺炎
B.胸膜炎
C.气胸
D.支气管哮喘
E.肺癌
参考答案:D
解析:咳嗽伴胸痛常见于肺炎、胸膜炎、支气管肺癌、肺栓塞和自发性气胸等。
土地是重要的生产资料,尤其是在生产力还不发达的古代社会,统治者更是十分重视土地问题的解决。商鞅变法、北魏孝文帝改革、俄国农奴制改革是如何解决土地问题的?这一问题的解决分别产生了什么影响?
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低压加热器泄漏后查找方法有()。
A.汽侧水压试验法
B.火焰法
C.塑料薄膜法
D.灌水查漏法