肺痨的治疗大法以何者为主（）
A.滋阴
B.益气
C.养血
D.温阳
E.抗痨
参考答案：A
— Why is e-shopping getting more and more popular?
— It _____ save a lot of trouble and time if it is properly used. [ ]
A. need
B. should
C. can
D. has to
试解释气体燃料着火半岛的三限各自的着火机理？
