下列叙述滤过除菌不正确的是()

A．滤材孔径在0.2μm以下，才可有效地阻挡微生物及芽孢的通过

B．本法适用于多数药物溶液，但不适于生化制剂

C．本法属物理灭菌法，可机械滤除活的或死的细菌

D．本法同时除去一些微粒杂质

E．加压和减压滤过均可采用，但加压滤过较安全

You are the project manager responsible for developing a software application based on customer requirements．As the customer requirements keep changing frequently，what tool can you use to conduct integrated change control of your project ？（）

A．Project selection method

B．Additional plannin

C．Corrective actio

D．Project management information syste