备洞时原则上应去净龋坏组织，应去除的龋坏组织包括()
A．破坏层和透入层
B．颜色改变部分
C．透入层
D．脱矿层
E．脱矿层和透入层
参考答案：A
什么是特种设备？
As the number of compounding periods increases, what is the effect on the annual percentage rate (APR) and the effective annual rate (EAR)（）
A. APR increases, EAR increases.
B. APR increases, EAR remains the same.
C. APR remains the same, EAR increases.
