反复给药易产生快速耐受性的药物是()
A.增加心输出量
B.升高外周阻力和血压
C.松弛支气管平滑肌
D.抑制组胺等过敏物质释放
E.减轻支气管粘膜水肿
参考答案:C, D
Maggie wanted an evening job that would allow her to ______ her son during the day.
A.look at
B.look around
C.look after
D.look out
根据《全国消防条例》,各类()组织应当根据需要承担相应的消防安全职责
A.民间
B.保安、联防
C.消防
D.社会