吗啡常用于治疗急性肺水肿，其机制不包括（）
A.扩张全身静脉
B.扩张小动脉
C.镇静
D.减低肺血管通透性
E.增加ANP释放而加强利尿
参考答案：D
领导者只关心工作任务，而不关心人。此领导方式属于放任式的管理。
—Here are three books on history. Which one would you like to borrow?
—______. You see, I’m interested in geography these days.
A．All
B．None
C．Both
D．Each
