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
ars ago.She was working at a school at that time; she impressed me