问题 多项选择题

下面关于保护倒换描述正确的是:()。

A.保护倒换请求优先级别顺序是锁定保护>强制倒换>手动倒换>练习倒换;

B.K1高4位比特值越大说明倒换请求的级别越高;

C.K1值6F表示带额外业务的强制倒换请求;

D.SF和SD都可以触发MSP产生保护倒换;

E.APSID指示出工作通道序号,它通过K1b5-b8和K2b1-b4承载,确定故障段落倒换通道;

F.如果同时在不同段出现相同优先级的本地故障(SF或SD.,则具有较小信号编号的段的优先级高。

答案

参考答案:A, C, F

填空题

How did the Olympic Games start In ancient Greece athletic festivals were very important and had p ________ (1). Originally the Festival was held in honour of .Zeus, the supreme god in Greek Mythology. Eventually the Olympian athletic festival had lost its ________ (2) and became an international event. No one knows exactly ________ (3) the Olympic Games go, but some scholars recorded date from 776 B.C.According to some scholars, at first the only Olympic event was ________ (4), called a stadium and that was the only event until 724 B.C. After that, other ________ (5) were added and sixteen years later in ________ (6) the pentathlon was added and wrestling became part of the games. This pentathlon was a five-event match which ________ (7) running, wrestling, leaping, throwing the discus, and hurling the javelin.The games were held ________ (8) and after an uninterrupted history of 1170 years, the games ________ (9) in A.D. 394, the Christian era, because of their pagan origin.It was over ________ (10) before there was another such international athletics gathering. In 1896, the first of the modern ________ (11) opened in Athens, Greece.Nowadays, the Games are held in different countries ________ (12). The host country provides vast facilities such as stadiums and ________ (13).Many more sports are represented, including the very celebrated event: ________ (14).The Olympics start with the arrival in the stadium of a torch, ________ (15) on Mount Olympus by the sun’s rays. The torch is carried by ________ (16) to the stadium. The Olympic flame symbolizes the ________ (17) of the ancient Greek athletic ideals, and it burns throughout the Games until ________ (18). The well-known Olympic flag, however, is ________ (19): the five interlocking rings symbolize the uniting of all five continents ________ (20).

单项选择题