附着体义齿可以由哪些部分组成:()
A.附着体
B.桥体
C.人工牙
D.基托
E.连接体
参考答案:A, B, C, D, E
I first met Lisa three years ago.She was working at a school at that time; she impressed me
________her sincerity.[ ]
A. with
B. to
C. about
D. in
通过对世界上一些国家和地区的统计,得到人均国民生产总值在1000一3000美元时,城市化水平在:
A.30%~50%
B.30%~60%
C.50%~70%
D.70%以上