生理性止血过程中作用最重要的物质是( )
A．血小板B．血管C．组织因子D．抗凝物质E．维生素K
参考答案：A
忍不是无原则的退让，其底线是不能失去最后成就目标的基本条件。
You have just taken control of a project in the middle of execution and need to learn who has approval authority for revisions in scope. Which document provides this information
A) Resource assignment matrix.B) Change control plan.C) Project charter.D) Client organization chart.
