证明肠瘘存在的最重要的检查方法是()
A.B超
B.X线
C.CT
D.MRI
E.口服或胃管滴入亚甲蓝
参考答案:E
现代水利与传统水利的差异有哪些?
He is the most intrepid explorer in the present century.
A. successful B. fearlessC. reliable D. fearsome