外感发热的病机是（）

A.瘀血阻滞，壅遏不通

B.中气不足，阴火内生

C.肝气不舒，气郁化火

D.感受外邪，正邪相争

E.阴精亏虚，阳气偏盛

Have you ever been to Mount Huangshan, ___________is famous for its pine forests and "sea

of clouds"?

A．what

B．where

C．that

D．which