According to most linguists, beside the difference between speech and writing there is also a difference between ______ and informality.

A．formality

B．familiarity

C．normality

D．formula

"阴病治阳"的方法适用于下列何证（）

A.阴胜阳虚

B.阳胜阴虚

C.阴虚阳亢

D.阳虚阴盛

E.阴阳两虚