牙髓病的病因包括（）
A.细菌感染
B.创伤
C.温度刺激
D.激光
E.以上皆是
参考答案：A
She thought I was talking about her daughter, ____ in fact, I was talking about my daughter. [ ]
A. when
B. whom
C. which
D. while
XBRL的组成部分包括（）。
A.技术规格
B.分类标准
C.实例文档
D.样式单
