牙周病全身治疗的常用药物不包括（）
A.甲硝唑
B.四环素
C.羟氨苄青霉素
D.螺旋霉素
E.多种维生素
参考答案：E
If you ________ home without a word, your parents wouldn't be so worried now.
A．didn't leave
B．couldn't have left
C．hadn't left
D．shouldn't leave
客户档案主要包含哪些信息？
