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问题 单项选择题 A2型题

男性，16岁，3天来左膝关节肿胀，自幼于外伤后易出血不止。查体：皮肤黏膜未见出血及紫癜，出血时间为2min，凝血时间30min，凝血酶原时间正常，疾病分类应为（）

A.纤维蛋白生成障碍

B.凝血酶生成障碍

C.血小板异常

D.凝血活酶生成障碍

E.血管壁功能异常

答案

参考答案：D

问答题 简答题

在U形压差计上设置“平衡阀”有何作用？在什么情况下它是开着的？又在什么情况下它应该是关闭的？
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单项选择题

DOM is a platform and language- (51) API that allows programs and scripts to dynamically access and update the content, structure and style of WWW documents (currently, definitions for HTML and XML documents are part of the specification). The document can be further processed and the results of that processing can be incorporated back into the presented (52) . DOM is a (53) -based API to documents, which requires the whole document to be represented in (54) while processing it. A simpler alternative to DOM is the event-based SAX, which can be used to process very large (55) documents that do not fit info the memory available for processing.

A．specific

B．neutral

C．contained

D．related
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