关于产气荚膜梭菌正确的是
A. G-粗大杆菌
B. 分解多种糖类产酸不产气
C. 感染方式和条件与破伤风梭菌相似
D. 感染扩散能力弱
E. 通常是单独感染
下列符合破伤风梭菌感染的条件是
A. 吞入破伤风梭菌
B. 表皮擦伤
C. 手术切口
D. 新法接生
E. 伤口形成厌氧微环境
So far as I know, more than one person _______ connected with the accident.
A. is
B. has
C. are
D. have
Every possible means _______ tried, but without much result.
A. has been
B. have been
C. are
D. is