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

题型:单项选择题

问题:

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

B.MPEG-2

C.MPEG-4

D.MPEG-7

考点:计算机等级考试PC技术三级PC技术笔试
题型:单项选择题

阅读下面短文,掌握其大意,然后在每小题所给出的A、B、C三个选项中选出最佳选项。

Lisa has always been overweight. She wanted to lose weight, not just because she wanted to   1  more beautiful and healthier, but also because it would make life easier. For example, it was   2  for Lisa to find ready-made clothes that would fit. She had to ask a tailor (裁缝)   3  clothes that were large enough. In school, she needed a special  chair    4  was bigger and stronger than the other chairs. If she went for a walk, she got tired very quickly. She was also unhappy about the way people treated  5  sometimes. “People look at me and even make fun of me. That’s unfair! It’s true that I’m overweight, but I don’t think people   6  treat me differently because I’m big. I can’t enjoy   7  with my friends because I’m afraid of getting fatter.” Her friends and family never made fun of her. They tried to help her   8  . They wanted her to be happy and healthy. Sometimes when Lisa was feeling sad, she didn’t want to speak to   9 .

But now things are quite   10 . Last month her classmates were preparing for the School   11  Week. Someone advised Lisa to play the lead role of the proud Queen who was tall and fat. Lisa   12  and practiced a lot.

Soon after the play, Lisa became the star! She did   13  well that everybody remembered the proud Queen. They stood around her and said “  14 ” to her. She even won the School Best Actress Award for her wonderful performance.

Now Lisa doesn’t   15  about being fat any more. She believes in the English saying “Every dog has its day. ”

小题1:A. see             B. notice            C. look

小题2:A. easy           B. difficult           C. right

小题3:A. to buy          B. to cook           C. to make

小题4:A. which          B. who             C. whose

小题5:A. her            B. him              C. me

小题6:A. can           B. can’t              C. must

小题7:A. having dinner   B. watching TV      C. doing sports

小题8:A. however       B. instead          C. either

小题9:A. any dogs        B. police          C. anyone

小题10:A. same          B. different         C. old

小题11:A. Sports         B. Art             C. Science

小题12:A. agreed        B. disagreed         C. allowed

小题13:A. not           B. little              C. so

小题14:A. Sorry         B. Good luck        C. Congratulations

小题15:A. happy          B. worry            C. sad

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A.分裂前期、中期、后期、末期

B.分裂间期核分裂后期、末期

C.分裂间期和分裂前期、中期

D.分裂间期和细胞分裂期

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B.个人本位论思想

C.社会效益论思想

D.教育无目的论思想

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