Cumulus clouds that have undergone vertical development and have become cumulonimbus in form，indicate（）.

A.clearing weather

B.that a warm front has passed

C.probable thunderstorm activity

D.an approaching hurricane or typhoon

原发性醛固酮增多症（）

A．ACTH升高

B．ACTH降低

C．醛固酮升高

D．尿蛋白(+)

E．T3、T4升高