Project schedule management is made up of six management processes including: activity definition, activity sequencing, ______, and schedule control by order.

A．activity duration estimating, schedule developing, activity resource estimating

B．activity resource estimating, activity duration estimating, schedule development

C．schedule developing, activity resource estimating, activity duration estimating

D．activity resource estimating, schedule developing, activity duration estimating

女性，32岁。因不明原因发热2周来院门诊。体检：心脏有杂音。拟诊感染性心内膜炎入院哪种心脏瓣膜病变最易发生感染性心内膜炎（）。

A.主动脉瓣关闭不全伴心衰

B.重度二尖瓣狭窄

C.二尖瓣关闭不全

D.二尖瓣脱垂

E.二叶式主动脉瓣狭窄