下列哪一种光纤的带宽最宽（）
A、多模式阶跃型光纤
B、多模式渐变型光纤
C、单模式阶跃型光纤
参考答案：C
氯丙嗪又称
A．冬眠灵
B．奋乃静
C．泰尔登
D．氯氮平
E．止呕灵
—When was your daughter born?
—She was born ________June 1,2000.
A.in B.at C. on
