36. Immediate action should be _______ to prevent people from being affected by the bird flu.

A．made

B．brought

C．taken

D．paid

在生产硅酸盐水泥时，设法提高（）的含量，可以制得高抗折强度的道路水泥。

A.C3S

B.C2S

C.C3A

D.C4AF