检查主动脉与降主动脉的连接用什么超声切面（）.
A.大动脉短轴
B.主动脉弓短轴
C.心尖五腔
D.左室流出道短轴
E.主动脉弓长轴
参考答案：E
(2013·高考山东卷)Finally he reached a lonely island ________ was completely cut off from the outside world.
A．when
B．where
C．which
D．whom
引起腹外疝的因素为
A．婴儿经常啼哭
B．腹压增高
C．年老体弱
D．腹壁缺损
E．肥胖
