全口义齿摘戴时疼痛,定位明确,戴入后无明显不适。其原因是()
A.基托边缘过长
B.基托进入组织倒凹
C.基托组织面有小结节
D.骨隆突处未缓冲
E.基托不密合
参考答案:B
若a=7b(a、b均不为0),则a是b的倍数,b 是a的约数.…______.(判断对错)
A.(A) Restaurant owner and customer.
B.(B) Teacher and student.
C.(C) Husband and wife.
D.(D) Doctor and patient.