Cushing综合征患者可有红细胞数及血红蛋白增多，原因是（）

A.皮质醇刺激骨髓

B.慢性缺氧刺激骨髓代偿性增生

C.肾脏促红细胞生成素分泌增多

D.肾上腺素分泌增多引起应激性红细胞增多症

E.骨髓病变导致克隆性红细胞增多

The process of（）schedule activity durations uses information on schedule activityscope of work, required resource types, estimated resource quantities, and resource calendarswith resource availabilities.

A.estimating

B.defining

C.planning

D.sequencing