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问题 单项选择题

OptiXBWS1600GIII型的组网设计是G.652的光纤，因客户不慎误使用了同距离的G.655光纤，收端OTU会产生误码是因为那个因素改变所致（）。

A.衰减

B.色散

C.信噪比

D.非线性

答案

参考答案：B

写作题

上个星期天晚上，你和家人一起去看京剧。谈谈去之前你的心情及看过之后的体会。词数80个左右。

提示词语：look forward to ... , national opera, express Chinese culture, famous stories, facial paintings, wonderful gestures and fighting, have a nice evening ... 开头已给出，不计入总词数。

Last Sunday evening, my father, mother and I went to see Beijing Opera ...

                                                                             

                                                                             

                                                                             

                                                                             

                                                                             

                                                                             

                                                                             

                                                                             

                                                                             

                                                                             
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单项选择题

甲乙两车从两地相对开出，甲车时速为150公里川、时，乙车时速是甲车时速的2/3，3个小时后两车在中间某站相遇，问甲乙两站相距多少里？（）

A．1200里

B．1500里

C．750里

D．1040里
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