肝硬化最常见的并发症是（）.
A.肝肾综合征
B.上消化道出血
C.原发性肝癌
D.感染
E.肝性脑病
参考答案：B
She was the first woman ______ to the board.
A．to be appointed
B．having been appointed
C．appointing
D．to appoint
影响化学反应速度的主要因素有温度、压力、浓度、（）等。
