高危妊娠包括以下哪几项()
A.孕妇年龄<18岁或>35岁
B.有 * * 助产史者
C.过期妊娠
D.病毒感染
E.胆囊切除术后
参考答案:A, B, C, D
The World Health Organization gave a warning to the public without any ________ when the virus
of H1N1 hit Mexico in April, 2009.[ ]
A. delay
B. effort
C. schedule
D. consideration
尖端扭转型室性心动过速的病因为()
A.颅内病变
B.心动过缓
C.奎尼丁所致
D.先天性
E.电解质紊乱