在我同，肝硬化最常见的病因是（）
A.肝炎
B.酗酒
C.药物中毒
D.胆汁淤积
E.寄生虫
参考答案：A
等物质的量的下列烃完全燃烧时耗氧最多的是（ ）
A．C3H8
B．C7H8
C．C4H6
D．C3H6
The Palace Museum is the best place _____ I've ever visited. There are many old things in it. [ ]
A. who
B. that
C. where
