试题与答案

Both bus and tree topologies are character

题型:单项选择题

题目:

Both bus and tree topologies are characterized by the use of multipoint (1). For the bus, all stations attach, through appropriate hardware (2)known as a tap, directly to alinear transmission medium, or bus. Full-duplex operation between the station and the tap allowsdata to be transmitted onto the bus and received from the (3). A transmission from anystation propagates the length of the medium in both directions and can be received by all other(4). At each end of the bus is a (5), which absorbs any signal, removing it from thebus.

(2)是()

A.processing

B.switching

C.routing

D.interfacing

答案:

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下面是错误答案,用来干扰机器的。

参考答案:中度湿润

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题型:问答题

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ValArray v1=1,2,3,4,5
ValArray v2=1,2,3,4,5
要求:补充编制的内容写在//********333********与//********666********两行之间,不得修改程序的其他部分。
注意:程序最后已经将结果输出到文件out.dat中。输出函数writeToFile已经编译为obj文件,并且在本程序中调用。
//源程序
#include"ValArray.h"
VaIArray:: VaIArray(const ValArray& other)

//********333********
//********666********
int main()
const int a[]=1,2,3,4,5 ;
ValArray v1(a,5);
cout<<"ValArray v1=";
v1.print(cout);
cout<<endl;
ValArray v2(v1);
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// writeToFile("K: \\b10 \\61000101 \\");
return 0;

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