视诊肛门周围有红肿，触之有疼痛及波动感见于
A．肛裂B．痔C．肛门周围脓肿D．直肠癌E．直肠息肉
参考答案：C
His room needs _______,so he must have it ________.
A．painting ; painted
B．painted ; painting
C．painting ; painting
D．painted ; painted
以下哪一项是皮样囊肿和表皮样囊肿所独有的特征（）
A.生长缓慢
B.多见于儿童、年轻人
C.触诊坚韧而有弹性，似面团样
D.境界清
E.一般无自觉症状
