The main idea of this passage is that ______.

A．light causes sea color

B．sea coloration is varied because of a combination of length of light waves and micro- scopic plant life and silt

C．microscopic plant life causes sea color

D．water composition causes sea color

下列哪种情况会导致生理性高血糖（）。

A.呕吐

B.饮酒

C.甲状腺功能亢进

D.高热

E.腹泻