霍乱可出现（）
A.分泌性腹泻
B.渗出性腹泻
C.渗透性腹泻
D.动力性腹泻
E.吸收不良性腹泻
参考答案：A
— Amy, I called you yesterday evening, but nobody answered the phone.
— Oh, I _________ a walk with my mother at that time.
A．take
B．took
C．am taking
D．was taking
罗哌卡因是一种新型的长效酰胺类局麻药，其特点包括
A．运动和感觉阻滞分离好
B．心脏毒性低
C．有血管收缩作用，无需添加肾上腺素
D．可用于表面麻醉
E．对子宫胎盘血液无影响
