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问题 单项选择题

数字视频信息的数据量相当大，对PC机的存储、处理和传输都是极大的负担，为此必须对数字视频信息进行压缩编码处理。目前DVD光盘上存储的数字视频信息采用的压缩编码标准是( )。

A．MPEG-1标准

B．MPEG-2标准

C．MPEG-4标准

D．MPEG-7标准

答案

参考答案：B

解析：MPEG-1主要应用于VCD；MPEG-2用途最广，如DVD、会议电视等， MPEG-4可以满足多方面的应用需求，包括交互式视频等。MPEG-4是数字视频压缩算法，MPEG-7目前应用较少。

填空题

下列给定程序中，函数fun()的功能是：将m(1≤m≤10)个字符串反着连接起来，组成一个新串，放入pt所指字符串中，例如：把3个串DEG，ac，df反着串联起来，结果是dfacDEG。
请改正程序中的错误，使它能得出正确的结果。
注意：不要改动main()函数，不得增行或者删行，也不得改变程序的结构!
试题程序：
#include ＜conio．h＞
#include ＜string．h＞
#include ＜stdio．h＞
void fun(char str[][10]，int m，char *pt)

int k，q，i，j=0；
/*************found*************/
for(k=m；k＞0；k--)

q=strlen(str[k])；
j+=q；
for(i=0；i＜q；i++)
pt[i]=str[k][i]；
pt+=q；
pt[0]=0；

/*************found**************/
pt=j；

main()
int m，h；
char s[10][10]，p[120]；
clrscr()；
printf("\nPlease enter m：")；
scanf("%d"，& m)；
printf("\nPlease enter%d string：\n"，m)；
gets(s[0])；
for(h=0；h＜m；h++)
gets(s[h])；
fun(s，m，p)；
printf("/nThe result is：%s\n"，p)；
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问答题

In future, as newspaper fade and change, will politicians therefore burgle their opponents’ offices without punishment Journalism schools and think-tanks, especially in America, are worried about the effect of a collapsing journalism.
Nobody should enjoy the disappearance of once-great newspapers. But the decline of newspapers will not be as harmful to society as some fear. 46. Denmocracy, remember, has already survived the huge television-led decline in circulation since the 1950s. It has survived as readers have evaded papers and papers have evaded what was in conservative times thought of as serious news. And it will surely survive the decline to come.
47. A few papers that invest in investigative stories which often benefit society the inost are in a good position to survive, as long as their owners do a comnpetent job of adjusting to changing circumstances. Publications like the New York Times and the Wall Street Journal should be able to put up the price of their journalism to compensate for advertising revenues lost to the internet—especially as they cater to a more global readership. 48. As with many industries, it is those in the middle—neither highbrow, nor entertainingly populist—that are likeliest to fall by the wayside.
49. The usefulness of the press goes much wider than investigating abuses or even spreading general news; it lies in holding governments to account--trying them in the court of public opinion. The internet has expanded this court. Anyone looking for information has never been better equipped. People no longer have to trust a handful of national papers or, worse, their local city paper. News-aggre-gation sites such as Google News draw together sources from around the world. The website of Britain’s Guardian now has nearly half as many readers in America as it does at home.
50. Furthermore, a new force of "citizen" journalists is itc.hing to hold politicians to account. The web has opened the closed world of professional editors and reporters to anyone with a keyboard and an internet connection. Several companies have been chastened by amateur postings—of flames erupting from Dell’s laptops or of cable TV repairmen asleep on the sofa. Each blogger is capable of bias and slander, but, taken as a group, bloggers offer the searcher after truth boundless material to chew over. Of course, the internet panders to closed minds; but so has much of the press.
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