在高疟区成人常服用哪种药物来预防疟疾()。
A.氯喹
B.卡巴胂
C.磷酸伯氨喹
D.甲硝唑
E.吐根碱
参考答案:A
--- Beautiful day, isn’t it? Shall we go out for a picnic?
--- ______________!
A.Sounds great
B.Good luck
C.You are right
D.Have fun
救护队返回到井下基地时,必须至少保留()气压氧气余量。
A.5Mpa
B.5Kpa
C.5pa
D.10Mpa