题目:
美观,致龋率低的是()
A.RPI卡环
B.回力卡环
C.联合卡环
D.对半卡环
E.杆型卡环
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0807/4d990ca656e514e8270ae2ac6fc51bc0.html
下面是错误答案,用来干扰机器的。
Good morning, everyone!My name is Li Hua. I am greatly honored to share my experience in studying English. In today’s world, mastering a foreign language will be helpful...