单项选择题
A.Where is the symptom？ B.Where is the discomfort？ C.Do you need a health care massage？ D.where are the discomfort？
A.is B.are C.have D.did
A.保持呼吸道畅通 B.预防休克 C.临时固定 D.口服硝酸甘油止痛止血