肺动脉瓣关闭不全最常见的病因是()。 ["特发性肺动脉扩张","肺动脉瓣病变如风湿性心脏病","马凡氏综合征致肺动脉扩张","继发于肺动脉高压所致肺动脉干的根部扩张","感染性心内膜炎致肺动脉瓣穿孔"]
SAH的主要病因是() ["高血脂","高血压","感染","动脉硬化","动脉瘤"]
诊断颅底骨折最可靠的依据是() ["头颅X线片","脑电图检查","头部CT扫描","临床表现","头部外伤史"]
患者,女婴,4个月,1周来口腔黏膜出现白色凝乳状的斑点及斑块,可擦掉。患儿啼哭,哺乳困难。应怀疑为() ["鹅口疮","复发性龈口炎","疱疹性龈口炎","球菌性口炎","克罗恩病"]
慢性肺脓肿空洞可以是() ["圆形","椭圆形","不规则形","多房性","以上都是"]
神经的兴奋可以向____与____双向扩散。