肛痈的特点，下列哪项是错误的
A．发病急骤
B．疼痛剧烈
C．肛 * * 肥大
D．高热
E．破溃后均能形成肛漏
参考答案：C
改错。
( ) 1. They bring gifts to us. ____________
A B C
( ) 2. There are four season in a year. ____________
( ) 3. What a hot, sun day! ____________
( ) 4. I can skate at the ice. ____________
( ) 5. Everyone looks out for the window. ____________
能表现细胞毒的细胞是
A．NK细胞
B．B细胞
C．肥大细胞
D．细胞毒性T淋巴细胞
E．浆细胞
