To define variance thresholds at designated time points over the duration of a project, you will use （）.

A．units of measure

B．precision level

C．organizational procedure links

D．control thresholds

粮面密封膜内部结露，应（）。

A.压盖粮面，机械通风

B.压盖粮面，密闭保护

C.揭开薄膜，驱散表层水分

D.揭开薄膜，晾干结露水，再驱散表层水分