There____a banana and two apples on the table.[ ]
A. is
B. are
C. have
D. has
答案:A
基牙健康状况较差时,应考虑()
A.基托蜡型适当加大
B.基托蜡型适当减小
C.不需要制作唇侧基托
D.基托蜡型适当变薄
E.基托蜡型适当加厚
锁状联合的功能:(),()。