按照作用分类，物流可分为（）
A.供应物流
B.销售物流
C.生产物
D.回收物流
E.废弃物物流
参考答案：A, B, C, D, E
Which of the following health-promoting activities should the nurse teach the client with a new laryngectomy
A．Cleanse the mouth three times a day.
B．Avoid taking tub baths.
C．Develop an aggressive program of exercise to increase airway functioning.
D．Dehumidify the air for comfort.
慢性根尖周炎主要的诊断指标是（）。
A.牙髓无活力
B.咀嚼不适感
C.反复肿痛史
D.叩诊异样感
E.根尖周x线透射区
