菌斑内的矿物质转换主要是菌斑与下列哪项之间的矿物质转换 A．牙本质 B．牙骨质 C． 发布时间：2017-07-12 17:00 │ 来源：www.tikuol.com 题型：单项选择题 问题： 菌斑内的矿物质转换主要是菌斑与下列哪项之间的矿物质转换A．牙本质B．牙骨质C．龈沟液D．牙髓E．牙釉质
题型：单项选择题 — Don't put the waste on the ground, young man. — Oh, I'm sorry. I _____ the dustbin there.A. hadn't seen B. didn't see C. can't see D. haven't seen 查看答案