He has _________ friends than I. [ ]
A. much more
B. many more
C. very more
答案:A
扩肛法多用于治疗()
A.纤维型内痔
B.结缔组织外痔
C.骨盆直肠间隙脓肿
D.早期肛裂
E.混合痔
在钢中加入适量的锰,可以提高钢的()性和()性。