这个标志是何含义?()
A.国道编号
B.省道编号
C.县道编号
D.乡道编号
参考答案:D
位于放射治疗范围内的牙齿拔除时间是()
A.放射治疗前
B.放射治疗结束后速拔
C.放射治疗前后均不应拔
D.放射治疗后1个月
E.放射治疗后1周即可
The Flinders bar and the quadrantal spheres should be tested for permanent magnetism at what interval().
A.They are not subject to permanent magnetism; no check is necessary
B.Semiannually
C.Annually
D.Every five years