肛瘘术后伤面久不愈合,其原因有()
A.内口无处理
B.糖尿病患者
C.原有肺结核
D.伤面继发感染
参考答案:A, B, D
Since you are tired, you'd better_______ and have a good rest. [ ]
A. stop to study
B. stop study
C. stop studying
如何理解艺术作品的“空白”和“不确定点”?