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【多选题】
下列属于占用区间的情况有：（ ）A.
区间内已进入列车。
B.
区间已被列车取得占用的许可（包括准许时间内未收回的出站、跟踪调车凭证)。
C.
封锁的区。按《》规定，为了救援、施工等特殊需要，使用调度命令发出的列车除外，比如，向电话呼唤５ｍｉｎ无人应答，由列车调度员查明该站及其相邻两区间确无列车（包括单机、动车及重型轨道车）后，发布调度命令，封锁相邻区间，向不应答站发出列车；区间内停有故障或事故列车、机车、等，调度命令封锁区间，需要向被封锁的区间发出的救援列车；向施工封锁区间发出的列车。
D.
区间内有停留或溜入的机车、车辆、动车、重型轨道车、施工作业车辆。
E.
发出进入正线的列车而区间内道岔向岔线开通。
F.
邻线已进入禁止在区间交会的列车。
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【判断题】According to Sun Yatsen’saying, there would not have been the prosperity of the Han and Tang dynasties, or the integration of southern and northern peoples without the Great Wall.
A.
正确
B.
错误
【判断题】According to Sun Yatsen’ saying, there would not have been the prosperity of the Han and Tang dynasties, or the integration of southern and northern peoples without the Great Wall.
A.
正确
B.
错误
【简答题】When Carly Fiorina became Hewlett-Packard’s first female chief executive officer, the existence of her househusband, Frank Fiorina, who had retired early from AT&T to support her career, was a mini-se...
【简答题】静脉治疗操作时，最简单有效的预防感染的方法是什么?
【单选题】In a new list of the most powerful gay men and women in the country, out magazine has lots of household names at the top. But high among the rich and famous is Tim Gill. Huh? Who is he, and why is he ...
A.
There are many big names at the top of the list.
B.
Tim Gill is the fourth most rich and famous on it.
C.
Most of the powerful persons listed are homoerotic.
D.
Gill is one of the most powerful people in America.
【多选题】Sun Yatsen ever said, “Seen from today, if it had not been for the protection of the Great Wall, Chinese civilization would have been interrupted by the northern peoples in ______________ dynasties, l...
A.
the late Qin or early Han
B.
the Song and Ming dynasties
C.
the Han and Tang
D.
Qing
【单选题】下列关于三层设备转发数据包的过程说法错误的是( )
A.
查看目的地址与路由表中条目是否匹配时，是看主机号部分是否相同
B.
如果与目的地址匹配的路由条目只有一条，则按照这条路由转发数据包
C.
如果没有与目的地址匹配的路由，则丢弃该数据包
D.
如果有多条路由与目的地址匹配，则选择掩码最长的路由
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