I was almost _______ to death at the sight of the ________ scene.

A．frightening, frightened

B．frightening, frightening

C．frightened, frightened

D．frightened, frightening

OptiX 2500+子架的IU2板位的开销对偶板位是（），IU3的开销对偶板位是（），IU4的开销对偶板位是（）。