病毒性肝炎最常见的症状是
A．发热
B．疲倦乏力
C．体重减轻
D．肝区痛
E．食欲减退
参考答案：B
Never in my life ____ such a thing.
A．I have heard or have seen
B．have I heard or seen
C．I have heard or seen
D．did I hear or see
分馏塔冲塔后，汽油的质量会不合格。
