常用化学治疗的给药方法有________用药、____用药及______用药。
参考答案:联合;序贯;周期同步化
三国两晋南北朝时期,北部和南部的少数民族大量涌入中原。 ( )
--This is film I've told you about. Isn't it wonderful one?
--Yes, it's great. [ ]
A. the, a
B. the, the
C. a, a
D. a, the