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【单选题】
五层协议的网络体系结构中,___ 负责为分组选择合适的路由,使源主机运输层所传下来的分组能够交付到目的主机。A.
应用层
B.
运输层
C.
网络层
D.
物理层
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【简答题】We all know the truth ________ there are air, water and sunlight there are living things. A. where B. wherever C. that D. that wherever 2. _____ is troubling me is _____ I don’t understand _____...
【单选题】The Yerkes-Dodson law demonstrates that
A.
the level of arousal becomes too low, our performance will inrease.
B.
the level of arousal becomes too high, our performance will increase.
C.
the level of arousal is moderate, our performance will be best.
【单选题】下列说法错误的是( )。
A.
网络图只允许有一个起点节点，但可以有两个终点节点。
B.
网络图中不允许出现编号相同的节点或工作。
C.
网络图中允许出现循环回路。
D.
网络图中可以出现有双箭头或无箭头的“连线”。
【简答题】It is hoped that the federation's effort will go a long way in helping the female medical staff members avoid and as they go about doing a commendable job. (embarrass, convenient)
【简答题】简述耶基斯一多得森（Yerkes-Dodson）法则。
【多选题】双代号网络图的绘制规则说法正确的是( )
A.
网络图中，不允许出现编号相同的节点或工作。
B.
网络图中，允许出现编号相同的节点或工作。
C.
箭线应以水平线为主，竖线和斜线为辅，不应画成曲线。箭线宜保持自左向右的方向，不宜出现箭头指向左方的水平箭线或箭头偏向左方的斜向箭线。
D.
正确应用虚箭线，力求减少不必要的虚箭线。
【单选题】It is widely______ that smoking can cause cancer. A. believed B. think C. say D. hoped
A.
1
B.
2
C.
3
D.
4
【单选题】The Yerkes-Dodson law demonstrates that
A.
the level of arousal becomes too low, our performance will increase.
B.
the level of arousal becomes too low, our performance will decrease
C.
the level of arousal becomes too low, our performance will be best.
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