The manager looked around the meeting room and said,“_____ everybody has arrived, let’s begin our meeting.”

A．As if

B．Only if

C．Now that

D．In case

关于皮脂腺囊肿与皮样囊肿，下列哪项正确

A．皮脂腺囊肿简称皮样囊肿
B．皮脂腺囊肿是皮脂腺排出管阻塞所致
C．皮样囊肿是皮肤化脓感染引起
D．皮样囊肿与表面皮肤紧密相连，无活动
E．皮脂腺囊肿与深层组织相连，活动性大