______ number of the students in their school is about two thousand, ______ of them are boys.

A．A; two thirds

B．The; two third

C．The; two thirds

D．A; two third

肺结核患者的治疗效果是（）

A.总治愈率为99％

B.新发肺结核的治愈率为95％以上

C.新发肺结核的治愈率为80％左右

D.新发肺结核的治愈率为85％以上

E.新发肺结核的治愈率为60％左右