____ of the land in that district ____ covered with trees and grass.

A．One half; are

B．Two seventh; is

C．A quarter; is

D．Two thirds; are

艾滋病患者症见淋巴结持续肿大，伴发热，神疲乏力，食欲不振，腹泻，消瘦，盗汗等全身症状，舌红，苔薄黄腻，脉细数。中医辨证为（）

A.邪毒外袭

B.阴虚痰凝

C.肺肾阴虚

D.痰热蒙闭

E.痰瘀交阻