高血压危象治疗，首选药物为（）
A.硝普钠静脉滴注
B.复方降压片口服
C.卡托普利口服
D.氢氯噻嗪注射
E.普萘洛尔口服
参考答案：A
Little Tom was very nervous in front of so many strangers, so he ____ and ran to his mother. [ ]
A. turned out
B. turned off
C. turned down
D. turned around
设备使用的“三好”是管好、用好、（）。
