—I'm always afraid of speaking in public.

—_______. You can do it well. [ ]

A. Not afraid.

B. Take it easy.

C. You are silly.

D. Good luck.

下列哪一种酶不参与血小板的花生四烯酸代谢过程（）

A.激肽释放酶

B.环氧化酶

C.血栓素合成酶

D.磷脂酶A

E.cAMP