SOTU10G间接调制色散容限值为多少？（）
A.3200ps/nm
B.12800ps/nm
C.800ps/nm
D.400ps/nm
参考答案：C
An analyst gathered the following information for a company whose common stock is currently priced at $40 per share:（）
A．26.5
B．1.16
C．25.6
香港地区的主要经济支柱是（）
A.加工工业
B.农业
C.对外贸易
D.旅游业
