多个相邻的毛囊及其所属皮脂腺或汗腺的急性化脓性感染，可见于（）

A.疖

B.痈

C.丹毒

D.急性蜂窝织炎

E.脓肿

33．It was the first time that Mike______the piano at the concert hall and he hoped that his nervousness would go      ．

A．played；unnoticed

B．had played；unnoticed

C．played；unnoticing

D．had played；unnoticing