消风散的功用是
A.祛风散寒,活血止痛B.疏风除湿,清热养血C.祛风解表,散寒除湿D.祛风化痰,通络止痉E.祛风化痰,止痉定痛
参考答案:B
操作风险
A spark arrestor().
A.keeps sparks from falling into an open tank
B.secures covers on ullage openings
C.prevents sparks from getting out of an enging's exhaust system
D.grounds static electicity