自愿意外伤害保险和法定意外伤害保险的分类依据是（）。
A.按保险期限分类
B.按保险危险分类
C.按险种结构分类
D.按投保动因分类
参考答案：D
Zishi Middle School is one of _____ schools in Haian and it has become _____ .
A．the biggest, much famous
B．biggest, more famous
C．the biggest, even more famous
D．bigger, much famous
真正用于电信业务的比特的SDH帧结构功能区域是（）。
