下列不符合肺心病体征的是()
A.颈静脉怒张
B.肺动脉瓣区第二音亢进
C.剑突下示心脏搏动
D.下肢水肿
E.心浊音界向左下扩大
参考答案:E
English is a language that many people around the world ____ not speak perfectly but ____ at least understand.
A.may; can
B.would; might
C.will; must
D.could; might
射线装置包括()
A、X射线机
B、加速器
C、中子发生器
D、以上都是