数字视频的数据量非常大，VCD使用的运动视频图像压缩算法MPEC-1

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数字视频的数据量非常大，VCD使用的运动视频图像压缩算法MPEC-1对视频信息进行压缩编码后，每秒钟的数码率大约是______Mbps。

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参考答案：1～2

解析：略

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If you have ever been discouraged because of failure,please read on.For often,achieving what you __1 __to do is not the important thing.Let me explain. Two brothers decided to dig a__2 __hole behind their house.As they were working,a couple of older boys stopped by to__3 __. "What are you doing?"asked one of the visitors. "We plan to dig a hole all the way through the earth!" one of the brothers__4 __excitedly. The older boys began to laugh,__5 __the younger ones that digging a hole all the way through the earth was__6 __.After a long__7 __,one of the diggers picked up a jar full of spiders,worms and a wide variety of insects.He__8 __the lid and showed the wonderful contents to the scoffing (嘲笑)__9 __. Then he said quietly and__10__,"Even if we don't dig all the way through the earth,look what we have found along the way!" Their__11__was far too ambitious,but it did__12__them to dig.And that is what a goal is for-to cause us to move in the__13__we have chosen；__14__to set us to digging! But not every goal will be fully__15__.Not every job will end successfully.Not every relationship will endure.Not every hope will come to pass.Not every love will last.Not every endeavor will be completed. Not every dream will be__16__. But when you__17__your aim,perhaps you can say,"Yes,__18__look at what I found along the way! Look at the wonderful things which have come into my life because I tried to do something!" It is in the__19__that life is lived.And I believe it is joy in the journey,in the end,that truly__20__.
( )1. A.look forward ( )2. A.wide ( )3. A.watch ( )4. A.whispered ( )5. A.expressing ( )6. A.unnecessary ( )7. A.silence ( )8. A.folded ( )9. A.volunteers ( )10. A.confidently ( )11. A.idea ( )12. A.make ( )13. A.decision ( )14. A.as a result ( )15. A.achieved ( )16. A.predicted ( )17. A.correspond to ( )18. A.but ( )19. A.searching ( )20. A.regards	B. set out B. deep B. discuss B. commented B. explaining B. impossible B. intention B. covered B. hunters B. curiously B. thought B. expect B. feeling B. in other words B. absorbed B. grasped B. head for B. so B. digging B. proves	C. set about C. large C. introduce C. lectured C. telling C. unbelievable C. recreation C. removed C. contributors C. immediately C. goal C. cause C. chance C. now and then C. controlled C. realized C. live up to C. and C. arranging C. occurs	D. give in D. shallow D. instruct D. volunteered D. arguing D. incorrect D. imagination D. deleted D. visitors D. strictly D. belief D. force D. direction D. all the way D. decided D. depended D. fall short of D. or D. discovering D. matters

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单项选择题

AP接入点（ACCESS POINT）是用于无线网络的无线HUB，是无线网络的核心。它是移动计算机用户进入有线以太网骨干的接入点，AP可以简便地安装在天花板或墙壁上，它在开放空间最大覆盖范围可达（）米，无线传输速率可以高达11Mbps。

A.3

B.30

C.300

D.3000

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