FR-Ⅲ矫治器的唇挡下缘在()
A.牙龈上方至少4mm
B.牙龈上方至少6mm
C.牙龈上方至少7.5mm
D.与牙龈平齐
E.以上都不对
参考答案:D
Take your time! We have _____time left. [ ]
A. little
B. few
C. a little
D. a few
目前我国的药师分为
A.药师和主管药师B.药师和执业药师C.药师和驻店药师D.驻店药师和执业药师E.主管药师和执业药师