题目内容

根据地面―车上信息传输方式的不同,列车超速防护系统分为哪两类?

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悬臂式可变信息情报板由立柱、LED显示屏、控制器、()、通讯系统组成,安装于高速公路车道旁,由监控中心(分中心)控制,可显示文字及图形,用于向驾驶员发布路况、诱导、宣传及警示信息。

A. 照明系统
B. 供电系统
C. 分配器
D. 传输系统

根据交通部规则规定,收费棚净高必须大于()。

A. 4.5m
B. 5m
C. 6m
D. 4m

You work as the application developer at Certkiller .com. Certkiller .com uses Visual Studio.NET 2005 as its application development platform.You are developing a .NET Framework 2.0 application used to store a type-safe list of names and e-mail addresses. The list will be populated all at ones from the sorted data which means you well not always need to perform insertion or deletion operations on the data. You are required to choose a data structure that optimizes memory use and has good performance.What should you do?()

A. The System.Collections.Generic.SortedList class should be used
B. The System.Collections.HashTable class should be used
C. The System.Collections.Generic.SortedDictionary class should be used
D. The System.Collections.SortedList class should be used

相对湿度表示()中所含水蒸汽的份量接近饱和的程度,故也称()。

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