局限于外耳道软骨段的病变是
A.恶性外耳道炎
B.外耳道疖
C.外耳道霉菌病
D.外耳道炎
E.上述都不是
参考答案:B
Everyone is here ______ LiuMing.Because he was ill. [ ]
A. from
B. for
C. to
D. except
机组短期停运,不超过三天,凝汽器水侧可以不放水,维持运行状态()