影响药物胃肠道吸收的生理因素不包括()
A.胃肠液成分与性质
B.胃肠道蠕动
C.循环系统
D.药物在胃肠道中的稳定性
E.胃排空速率
参考答案:D
What type of stern tube bearing has the least friction().
A.Oil-lubricated bearings
B.Lignum vitae
C.Hard rubber
D.Bronze bushings