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问题 单项选择题

CANBUS总线控制系统是一套先进且被广泛使用的数据传输系统，每秒最快可传输500kb的数据，CANBUS系统的优点是（）。

A.减少线束、传输速度快

B.方便拆卸

C.减小噪音

D.消除故障

答案

参考答案：A

单项选择题

编写如下事件过程：
Private Sub Form-MouseDown(Button As Integer,Shift As Integer,X As Single,Y As Single)
If Shift=6 And Button=2 Then
Print"Hello"
End If
End Sub
程序运行后，为了在窗体上输出“Hello”，应在窗体上执行以下( )操作。

A．同时按下Shift键和鼠标左键

B．同时按下Shift键和鼠标右键

C．同时按下Ctrl、Alt键和鼠标左键

D．同时按下Ctrl、Alt键和鼠标右键
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单项选择题 共用题干题

Astute service providers realize that the continued support of legacy X.25 and asynchronous network element using separate operations network is cost(16).For example,the maintenance of multiple networks can require additional staff. Often, this staff must be trained on multiple vendor technologies, sometimes requiring parallel groups specializing in each (17) .Hence, additional maintenance procedures must be maintained and administrative records are (18) .The duplication of transport facilities to carry (19)network traffic is an inefficient use of resources. And not surprisingly, more technologies installed in a central office means the necessity for more physical space, and an increase in power connections and power consumption migration of these (20) network elements to IP-based DCns is alogical strategy.

空白处（18）应选择（）

A.declined

B.proliferated

C.destroyed

D.produced
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