失眠症治疗时最常用的药物是
A．地西泮类
B．氯丙嗪
C．多塞平
D．奋乃静
E．阿米替林
参考答案：A
霍乱病人发病后最先出现的常见症状是（）
A.呕吐
B.腹泻
C.腹痛
D.畏寒发热
E.肌肉痉挛性痛
Most of us think of sharks as dangerous, owing to lack of information rather than fear.
A．due to
B．because
C．as
D．for
