对于波分系统，说法错误的是（）。
A.基于时分复用技术
B.可单纤双向传输
C.课双纤单向传输
D.基于波长复用技术
参考答案：A
—The old store enjoys a good reputation in this area.
—Can't agree more. There are very few, ________， complaints about their service.
A．if any
B．if so
C．if anything
D．if ever
1951年，北京市人民政府授予老舍的荣誉称号是
A．功勋艺术家B．幽默大师C．人民艺术家D．语言大师
