Many useful tools and techniques are used in developing schedule（）is a schedule network analysis technique that modifies the project schedule to account for limited resource.

A.PERT

B.Resource levelling

C.Schedule compression

D.Critical chain method

消渴病气阴两虚证，治疗应首选的方剂是（）。

A.逍遥散

B.天王补心丹

C.龙胆泻肝汤

D.玉女煎

E.七味白术散