M800设备，由ABC三站点组成的通道共享保护倒换业务分配图如下，_爱下问搜题

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问题多项选择题

M800设备，由ABC三站点组成的通道共享保护倒换业务分配图如下，即A－B之间有一对业务，B-C之间有一对业务。（设定OPCS单板的类型都为阻振态）请问下面的描述哪些正确（）

A.在未发生保护倒换时，OPCS单板都处于空闲状态，单板上的倒换状态指示灯为橙色

B.在对B站点进行A向环演戏，则A站点OPCS发生B向倒换，B站点OPCS发生A向倒换，C站点直通

C.如果对站点A做A向强制倒换，则A站点发生A向倒换，B站点发生B向倒换，C站点直通

D.如果A－B间的光缆断裂，则A站点发生A向倒换，B站点发生B向倒换，C站点直通

E.A向倒换时指示灯为红色，B向倒换时指示灯绿灯，直通时指示灯为黑色

答案

参考答案：A, D, E

单项选择题

制皮常用的方法有（）等

A.按皮、擀皮、拍皮、捏皮、摊皮和压皮

B.按皮、切皮、拍皮、捏皮、摊皮和压皮

C.切皮、擀皮、拍皮、捏皮、搓皮和压皮

D.切皮、搓皮、拍皮、按皮、摊皮和压皮

完形填空

I was an introvert(内向的人) by 36 . For as long as I remember, putting on a sincere smile when meeting someone had 37 been easy. The key to a sincere smile, 38 , is simple. It’s to be 39 . But that’s the source of the problem. When meeting people, 40 being excited, I often felt upset.
But we all know 41 are important. The more friends you have, the more opportunities you get, 42 it’s job opportunities, a romantic relationship, or business partners. So a smile is important to make others feel 43 . Mother Teresa said, “Every time you smile at someone, it is an action of love, a(an) 44 to that person, a beautiful thing.”
The smile I’m now talking about is not to make a face to cashiers or waiters. I’m talking about those 45 smiles you make when meeting old friends. So I’ve discovered a 46 . And I call this technique “Oh, it’s Jamie!” When I meet someone, I imagine an old friend of mine called Jamie who was my first friend when we were 47 kids. It’s 48 why my smile is as wide as I can possibly make. And it’s not just the smile, but my tone and attitude that turn warm as well.
And the best part, whenever you’re friendly to others, they turn friendly 49 . You’re not hearing this from me. Some research done by scientists actually 50 this claim. So do remember to give it a try.
Three years ago at the age of 23, I took a long hard look at my life and decided that I was 51 . 52 of my life, I set about 53 dramatic changes and now I have become a popular writer. My 54 reflects that nothing is too difficult if you 55 bravely.

A．rather than

A．comfortable