[单选题]光检测器是光接收机的核心部件，需满足响应度高，（）和响应速度快等要求。

正确答案 ：B

噪声低

[单选题]A Next Generation Network(NGN) is a (上题选择) network ,which is able to provide Telecomunication Services ti users and to make use of multiple broadband, QoS-enable transport technologies and in which service-related functions are () of the underlying transport-related technologies.

正确答案 ：B

independent

查看原题