I really appreciate ____ to help me with my maths, but I’m afraid that I have no time this week．

A．you to offer

B．it you offer

C．your offering

D．this you are offering

反映项目实施阶段的原材料实际消耗量、机械台班数和人工工日数的信息为( )。

A．流动信息
B．固定信息
C．项目外部信息
D．管理型信息