载波通讯方式在用电信息采集系统中应配置的端口号是（）
A.1
B.2
C.30
D.31
参考答案：D
My father served in the army in _____ when he was in _____. [ ]
A. 1950's; twenties
B. the 1950's; his twenties
C. the 1950's; the twenties
D. 1950's; the twenties
分红保险分配给保户的保单红利来源于保单盈余，而保单盈余的来源包括（）等。
A.利差益
B.利差损
C.汇兑益
D.汇兑损
