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【多选题】
下列哪些是波分系统对监控信道的基本要求（）。A.
监控通路不限制放大器的泵浦波长
B.
监控通路不限制放大器之间的距离
C.
监控通路不限制未来1310nm波长的业务
D.
在放大器失效时监控通路仍然可用
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反馈参考答案：
举一反三
【简答题】If I could give you only one piece of advice _________ selecting courses, it would be this: Challenge yourself!
【单选题】If I could give you only one piece of advice about selecting courses, it would be this: Challenge yourself! 此句属于_____________。
A.
简单句
B.
并列句
C.
并列复杂句
D.
复杂句
【简答题】文本属性面板中的“目标”下拉列表中,可以设置被链接文件显示窗口的打开方式,分别是:_parent、_selft、 、 。
【简答题】You may feel overwhelmed by the ___1__ of courses available to you. You will not be able to experience them all, but __2__ them widely! College offers many things to do and to learn, and each of them ...
【单选题】I would appreciate very much if you could give me some suggestions.
A.
this
B.
that
C.
it
D.
you
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