固定性药疹的好发部位是（）
A.非角化粘膜
B.角化粘膜
C.牙龈
D.口唇及口周皮肤
E.口角区、口唇内侧粘膜
参考答案：D
A: Hi! Aren’t we in the same English classB: ().A: Nice to meet you, Sue. I’m George.
A. How are you doing.
B. Yes, we are. My name’s Sue Deer.
C. Thank you very much.
D. It’s so wonderful to meet you.
如果规则不满足置信度阈值，则形如的规则一定也不满足置信度阈值，其中是X的子集。
