固定义齿修复最合适的年龄是()
A.15~25岁
B.20~30岁
C.25~35岁
D.30~45岁
E.45岁以上
参考答案:C
Everyone in the village is very friendly. It doesn't matter ________ you have lived there for a short or
a long time. [ ]
A. why
B. how
C. whether
D. when
下列哪几项属于烟草商业企业的服务对象()。
A.卷烟零售客户
B.工业企业
C.消费者
D.社会公众