题目内容
（请给出正确答案）
A.光线路局端，光网络终端，光网络单元，光分配网
B.光线路局端，光网络单元，光分配网，光网络终端
C.光线路局端，光网络单元，光网络终端，光分配网
D.光网络单元，光线路终端，光网络终端，光分配网
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更多“OLT(Optical Line Terminal)，ONU…”相关的问题
one of the best things you can do for your dog and yourself is to obedience train (驯服) it. Obedience training doesn't solve all behavior. problems, but it is the foundation for solving just about any problem. Training opens up a line of communication between you and your dog. Effective communication is necessary to instruct your dog about what you want it to do.
Training is also an easy way to establish the social rank order. When your dog obeys a simple request of "come here, sit," it is showing obedience and respect for you. It is not necessary to establish yourself as top dog or leader of the dog pack (群) by using extreme measures. You can teach your dog its subordinate (从属的) role by teaching it to show submission to you. Most dogs love performing tricks for you to pleasantly accept that you are in charge.
Training should be fun and rewarding for you and your dog. It can enrich your relationship and make living together more enjoyable. A well-trained dog is more confident and can more safely be allowed a grea- ter amount of freedom than an untrained animal.
Behavior. problems of dogs are believed to ______ .
A．be just part of their nature
B．worsen in modem society
C．occur when they go wild
D．present a threat to the community
A. And its functions include ().
B.Interface rate configuratio
C.Digital diagnosis for the optical interface
D.Auto shutdown function of the optical interface laser
E.Ethernet synchronizatio
A.Optical transmit unit (OTU)
B.Optical add/drop multiplexer (OAD)
C.4-channel 644M sub-rate convergence board(SRM42)
D.2-channel Gigabit Ethernet convergence board(GEM2)
A.Never look straight at output optical interface or tail fiber end surface that connects with it.
B. First you must disable laser output to avoid too strong output power burning down tail fiber end face.
C. Use an optical power meter to measure input interface power to avoid receiver burning down due to overload.
D. If there are no attenuators, loosen the receiver and tighten the transmitter to prevent optical input from overloading.
