题目

有一段1分钟的未压缩视频，帧分辨率为800×600，帧频25帧/秒，已知压缩后得到的文件大小约为20MB，压缩比为 100:1，则该视频的每帧像素所占位数是（） A . 1 位 B . 8 位 C . 24 位 D . 64 位 答案：C完形填空阅读下面短文，从短文后所给各题的四个选项(A，B，C和D)中，选出可以填入空白处的最佳选项． 　　We were 1 to gather up our things and return to our car when a man came up. He looked very 2 indeed and asked us 3 if we knew that these grounds were his own. Father looked troubled and the man 4 a notice, which said that camping (宿营) was strictly forbidden. 5 Father explained that he had not seen the 6 and did not know that camping was not allowed. 7 Father apologized, the man did not seem satisfied. He asked Father for name and 8 . All the way home, we were so 9 that hardly anyone spoke a word. This unpleasant thing had spoiled(迫害) a wonderful day in the 10 . 　　For the rest of the week, we 11 what would happen. The following Sunday, we stayed at home even though it was a 12 day. About noon, a large and very expensive 13 stopped outside our house. We were surprised when we saw several people preparing to have a picnic(野餐) in our small 14 . Father got very angry and went to ask them what they thought they were doing. You can imagine how 15 he was when he saw the man who had taken our address the week before! Both men burst out 16 and Father welcomed the strangers into the house. We became good 17 And we learned a lesson we have never 18 . That's “Don't do to others 19 you don't like to 20 to you.” 1． [　　] A．anxiousB．asked C．aboutD．happy 2． [　　] A．unpleasantB．polite C．strongD．pleased 3． [　　] A．quicklyB．angrily C．loudlyD．curiously 4． [　　] A．wroteB．stared at C．readD．pointed to 5． [　　] A．OurB．Poor C．ButD．Then 6． [　　] A．groundB．place C．noticeD．man 7． [　　] A．EvenB．When C．ThoughD．Because 8． [　　] A．houseB．car C．reasonD．address 9． [　　] A．worriedB．satisfied C．frightenedD．busy 10． [　　] A．cityB．country C．weekD．camp 11． [　　] A．waitedB．thought C．wonderedD．knew 12． [　　] A．rainyB．fine C．goodD．sad 13． [　　] A．manB．thief C．carD．dog 14． [　　] A．gardenB．house C．groundD．field 15． [　　] A．happyB．afraid C．angryD．surprised 16． [　　] A．fightingB．smiling C．laughingD．exciting 17． [　　] A．neighboursB．friends C．familiesD．farmers 18． [　　] A．learntB．know C．forgottenD．received 19． [　　] A．thatB．if C．whenD．what 20． [　　] A．be doneB．do C．doingD．get