病变可以恶性变的是（）
A.皮脂腺囊肿
B.皮内痣
C.交界痣
D.复合痣
E.成釉细胞瘤
参考答案：A, C, D, E
They ___classes when the earthquake happened.
A．had
B．would have
C．were having
D．are having
实热便秘的治法宜（）
A.清热通便
B.清热润肠
C.养血润肠
D.益气润肠
E.增液通便
