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1● 静态图像压缩标准JPEG2000中使用的是_____(60)____算法。
A.K-L变换
B.离散正弦变换
C.离散余弦变换
D.离散小波变换
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2● 双层双面的只读DVD盘片的存储容量可以达到_____(59)____。
A.4.7GB
B.8.5GB
C.17GB
D.6.6GB
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3● 电视系统采用的颜色空间中，其亮度信号和色度信号是相分离的。下列颜色空间中,__(58)___不属于电视系统的颜色空间。
A.YUV
B.YIQ
C.YcbCr
D.HSL
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4● PC 机处理人耳能听得到的音频信号，其频率范围是__(57)___。
A.80～3400Hz
B.300～3400Hz
C.20～20kHz
D.20～44.1kHz
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5● 利用动态规划方法求解每对结点之间的最短路径问题(all pairs shortest path problem)时，设有向图G=<V,E>共有n个结点，结点编号1～n，设C是G的成本邻接矩阵，用Dk(i,j)即为图G 中结点i到j并且不经过编号比k还大的结点的最短路径的长度（Dn(i,j)即为图G中结点i到j的最短路径长度），则求解该问题的递推关系式为___(56)___。
A.Dk(i,j)=Dk-1(i,j)+C(i,j)
B.Dk(i,j)=min{Dk-1(i,j),Dk-1(i,j)+C(i,j)}
C.Dk (i,j)=Dk-1(i,k)+Dk-1(k,j)
D.Dk(i,j)=min{Dk-1(i,j),Dk-1(i,k)+Dk-1(k,j)}
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6● 以下选项中，可以用于Internet信息服务器远程管理的是____(63)____。
A.Telnet
B.RAS
C.FTP
D.SMTP
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7● 在TCP/IP 网络中，为各种公共服务保留的端口号范围是__(64)____。
A.1～255
B.1～1023
C.1～1024
D.1～65535
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8● 在以下网络应用中，要求带宽最高的应用是___(65)___。
A.可视电话
B.数字电视
C.拨号上网
D.收发邮件
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9● DOM is a platform-and language-____(66)___API that allows programs and scripts to dynamically access and update the content, structure and style of WWW documents ( currently,definitions for HTML and XML documents are part of the specification ).The document can be further processed and the results of that processing can be incoporporated back into the presented ___(67)____.DOM is a ___(68)___-based API to documents ,which requires the whole document to be represented in ____(69)___while processing it .A simpler alternative to DOM is the event –based SAX,which can be used to process very large ___(70)___documents that do not fit info the memory available for processing.
A.specific
B.neutral
C.contained
D.related
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10● Melissa and Love Letter made use of the trust that exists between friends or colleagues. Imagine receiving an __(71)___from a friend who asks you to open it. This is what happens with Melissa and several other similar email __(72)___.Upon running ,such worms usually proceed to send themselves out to email addresses from the victim's address book, previous emails, web pages__(73)___.As administrators seek to block dangerous email attachments through the recognition of well-known ___(74)____,virus writers use other extensions to circumvent such protection. Executable (.exe) files are renamed to .bat and .cmd plus a whole list of other extensions and will still run and successfully infect target users.Frequently ,hackers try to penetrate networks by sending an attachment that looks like a flash movie ,which, while displaying some cute animation ,simultaneously runs commands in the background to steal your passwords and give the __(75)__access to your network.
A.attachment
B.packet
C.datagram
D.message
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