反映左心室后负荷变化的指标是()
A.中心静脉压
B.平均动脉压
C.肺毛细血管楔压
D.肺总阻力
E.左心室舒张末期压力
参考答案:B
儿童伤寒病程第一周内易发生的并发症是
A.肠出血
B.肠穿孔
C.支气管炎
D.中毒性心肌炎
E.溶血性尿毒综合征
The second half of his voyage was by far the more dangerous part ______ he sailed round the treacherous Cape Horn.
A.where
B.of which
C.during which
D.that