急性左心衰
参考答案：
是指各种原因使左心发生急性收缩力减退，急性心室负荷过重导致急性排血量降低，临床表现为急性肺水肿的一系列症状。
—It's difficult 'for the village children to cross the river for school.
—I think a bridge____________ over the river.[ ]
A. should be built
B. is being built
C. has been built
D. was built
耐甲氧西林的金黄色葡萄球菌(MRSA)
A.万古霉素
B.红霉素
C.氟康唑
D.两性霉素B脂质复合体
E.依米配能+亚胺培南
