【導(dǎo)讀】和維護(hù)以及前端應(yīng)用程序的開(kāi)發(fā)兩個(gè)方面。對(duì)于前者要求建立起數(shù)據(jù)一致性和完整性強(qiáng)、數(shù)。據(jù)安全性好的庫(kù)。而對(duì)于后者則要求應(yīng)用程序功能完備,易使用等特點(diǎn)。出一時(shí)間段內(nèi)的教師工作量。查詢功能也是系統(tǒng)的核心之一。此外，系統(tǒng)有完整的用戶添加、刪除和密碼修改功能，并具備報(bào)表打印功能。對(duì)教師而言，工作量是教師勞動(dòng)的重要表現(xiàn)因素，來(lái)定獎(jiǎng)勤罰懶的措施，提高教師的工作積極性。由于種種原因，現(xiàn)在教師工作量管理上存在著不及時(shí)、不準(zhǔn)確的現(xiàn)象。教師除可獲得學(xué)生成績(jī)的基本數(shù)據(jù)外，還可按要求獲得相應(yīng)的分析結(jié)果。而且從長(zhǎng)遠(yuǎn)發(fā)展來(lái)看，根據(jù)本校的實(shí)際情況和發(fā)展目標(biāo)開(kāi)發(fā)。VisualBasic的前身是QBASIC，語(yǔ)言基礎(chǔ)是BASIC。自從微軟推出VB后，據(jù)統(tǒng)計(jì)，僅在數(shù)據(jù)庫(kù)系統(tǒng)開(kāi)發(fā)領(lǐng)域，VB就。占了90％的份額。類似，Delphi的IDE中具有主控制窗體、對(duì)象查看窗口和窗體設(shè)計(jì)器。置方案，并且進(jìn)而確定組成系統(tǒng)的每個(gè)程序的結(jié)構(gòu)。塊組成，這些模塊之間的接口關(guān)系應(yīng)盡量簡(jiǎn)單。

　　

【正文】 的工作態(tài)度給我留下了深刻的印象。在這幾個(gè)月的工作和學(xué)習(xí)生活中，我收益匪淺。他無(wú)論在理論上還是在實(shí)踐中，都給與我很大的幫助，使我得到不少的提高，即使在百忙中，抽出了很多時(shí)間對(duì)我的論文進(jìn)行的批改和修正。使得我的論文不斷完完美，對(duì)數(shù)據(jù)庫(kù)和 VB 程序有了更深的學(xué)習(xí)。在我不能夠去學(xué)校讓老師當(dāng)面指導(dǎo)的情況下，還是在通過(guò)電話和 Email 進(jìn)行交流和傳遞信息。這對(duì)于我以后的工作和學(xué)習(xí)都有一種巨大的幫助，衷心地感謝他耐心的輔導(dǎo)！ 其次我要感謝的是以前的同班同學(xué)，在一開(kāi)始的調(diào)研和結(jié)構(gòu)化設(shè)計(jì)中他給予了我很大的幫 助，雖然后來(lái)由于種種原因沒(méi)能夠繼續(xù)指導(dǎo)我，但我還是要感謝他。給予我很大的幫助，不僅幫我解答了不少的難點(diǎn)，還給我提出了許多建議，我會(huì)以他為榜樣，更好地努力。將這種精神帶到以后的工作和學(xué)習(xí)，使得自己的工作更上一層樓。 最后，我衷心地感謝所有關(guān)心和幫助過(guò)我的人們。 參考文獻(xiàn) , 《 Database system implementation》 ,機(jī)械工業(yè)出版社 , 2020 GarcialMolina , Jeffrey , Jennifer Widom,《 An introduction to Database Systems(Seventh Edition), 機(jī)械工業(yè)出版社 ,2020 , 郭安源 , 葛曉東 , 《教育信息化系統(tǒng)開(kāi)發(fā)實(shí)例導(dǎo)航》 , 人民郵電出版社 ,2020 ,《數(shù)據(jù)庫(kù)開(kāi)發(fā)技術(shù)與工程實(shí)踐》 ,人民郵電出版社 ,2020 , 王虹 等 《 Visual basic 中文版高級(jí)應(yīng)用與開(kāi)發(fā)指南》 , 人民郵電出版社 , 2020 主編 等 《 VB課程設(shè)計(jì)與系統(tǒng)開(kāi)發(fā)案例》清華大學(xué)出版社 , 2020 ，《 Visual Basic數(shù)據(jù)庫(kù)開(kāi)發(fā)及工程實(shí)例》，人民郵電出版社 ，《 Visual Basic 數(shù)據(jù)庫(kù)開(kāi)發(fā)技術(shù)與工程實(shí)踐》，人民郵電出版社， 2020 ，汪遠(yuǎn)征，《 Visual Basic程序設(shè)計(jì)教程》，機(jī)械工業(yè)出版社， 2020 ，周學(xué)明，郭安源，《 Visual Basic企業(yè)辦公系統(tǒng)開(kāi)發(fā)實(shí)例導(dǎo)航》，人民郵電出版社，2020 ，王珊，《數(shù)據(jù)庫(kù)系統(tǒng)導(dǎo)論》，機(jī)械工業(yè)出版社， 2020 e, Calvin said. Cirocco glanced at him, got a glimpse of his brown eyes before he turned back to his work. That was my thought. A real big fusion ramscoop. The machinery is in the hub, electromagic field generators to funnel the interstellar hydrogen into the center, where it gets burned. Gaby shrugged. Ma kes sense. But what about doc king? Well, leaving the thing would be easy enough. just drop out a hole in the bottom and get escape velocity for free, plus some to fool around with. But there ought to he some sort of dingus that would telescope out to the center of rotation when the engine isn39。t running, to pic k up scout ships. The main engine has to he there. The only other way would be to space engines around the rim. I39。d want three, at least. More would be better. nd gir ls39。 dorms, but you saw everybody in the rec room and the dining hall and so on, and she was in my psychodrama group. Her hair had been black, and shiny as the lacquered furniture in Dr. Hong39。s rooms, her skin white like mother ofpearl, her eyes long and narrow (making him think of cats39。 eyes) and dar kly blue. She was fifteen, or so Nicholas believedmaybe sixteen. I39。m going home, she told him. It was psychodrama, and he was her brother, younger than she, and she was already at home。 but when she said this the floating ring of light that gave them the necessary separation from the small doctorandpatient audience, ceased, by i And w hen I was there it rained. There was a big ,39。 trouble at one of the generating piles, and the y shut it _ down and it got colder and colder until everybody in the hospital wore their blankets, just like Amerinds in books, and they loc ked the switches off on the heaters in the bathrooms, and the nurses and the screen told you all the time it wasn39。t dangerous, they werejust rationing power to keep from blacking out the important stuff that was still running. A nd then it rained, just like on Earth. They said it got so cold the water condensed in the air, and it was like the whole hospital was righ t under a shower bath. Everybody on the top floor had to e down because it rained right on their beds, and for two nights I had a man in my room with me that had his arm cut off in a machine. But we couldn39。t jump any higher, and it got kind of dark. It doesn39。t always get dark here, Diane said. Sometimes the rain sparkles. I think Dr. Island must do it to cheer everyone up. No, the waves explained, or at least not in the way you mean, Diane. Nicholas was hungry and started to ask them for something to eat, then turned his hunger in against itself, spat on the sand, and was still. es. I never met any one of his class w ho remembered him. They did not even remember that he was middleweight boxing champion. I mistrust all frank and simple people, especially when their stories hold together, and I always had a suspicion that perhaps Robert Cohn had never been middleweigh t boxing champion, and that perhaps a horse had stepped on his face, or that maybe his mother had been frightened or seen something, or that he had, maybe, bumped into something as a young child, but I finally had somebody verify the story from Spider Kelly. Spider Kelly not only remembered Cohn. He had often wondered what had bee of him. Robert Cohn was a member, through his father, of one of the richest Jewish families in New Yor k, and through his mother of one of the oldest. At the military school where he prepped for Princeton, and played a very good end on the football team, no one had made him raceconscious. No one had ever made him feel he was a Je w, and hence any different from anybody else, until he went to Princeton. He was a nice boy, a friendly boy, and very shy, and it made him bitter. He took it out in boxing, and he came out of Princeton with painful selfconsciousness and the flattened nose, and was married by the first gir l who was nice to him. He was married five years, had three children, lost most of the fifty thousand dollars his fa ther left him, the balance of the estate having gone to his mother, hardened into a rather unattractive mould under domestic unhappiness with a rich wife。 and just w hen he had made up his mind to leave his w if e she left him and went off with a miniaturepainter. As he had been thinking for months about leaving his wife and had not done it because it would be too cruel to deprive her of himself, her departure was a very healthful shock. The divorce was arranged and Robert Cohn went out to the Coast. In California he fell among literary people and, as he still had a little of the fifty thousand left, in a short time he was backing a review of the Arts. The review menced publication in Carmel, California, and finished in Provincetown, Massachusetts. By that time Cohn, who had been regarded purely as an angel, and whose name had appeared on th