【正文】 老師作業(yè)查詢和下載功能：老師可統(tǒng)計已交作業(yè)學生的人數，并可將已完成作業(yè)下載批改。 4 系統(tǒng)總體設計 .系統(tǒng)功能模塊的劃分 系統(tǒng)能模塊劃分圖如圖 21 下： 作 業(yè) 布置作業(yè) 老 師 學生作業(yè)提交與批改系統(tǒng) 圖 42 .系統(tǒng)結構總流程圖 系統(tǒng)的結構總流程圖如圖 22： 圖 43 用戶登陸系統(tǒng)，需要有用戶名和密碼，這些用戶名和密碼由學生首次運用該系統(tǒng)時注冊填寫，老師也可注冊填寫信息，但為判斷其身份，填寫真實學號時最后兩位為“ 99”。 老師作業(yè)管理 學生作業(yè)管理 學生作業(yè)提交 學生以往作業(yè)查詢 老師作業(yè)上傳 作業(yè)提交情況查詢 作業(yè)下載 Y 開 始 進入系統(tǒng) 登陸界面 新用戶注冊 是否通過驗證 N 退 出 3 .數據庫設計 數據庫采用 MS SQL SERVER 2020 管理作業(yè)數據庫。 本系統(tǒng)采用 ACCESS 作為數據庫，主要由于 Access 是 MICROSOFT OFFICE 軟件的一個組件，它的使用范圍比較廣泛，便于教師將每個作業(yè)庫從服務器上下載到本機離線批改；且作為小型的數據庫系統(tǒng)，已經能滿足本系統(tǒng)的需要。 數據庫中有兩張表，一張“作業(yè)題目”表，用于記錄與作業(yè)有關的信息；一張登陸表，用于記錄與學生老師登陸信息。 4．性能需求 數據精確度 “ xxxx 年 xx 月 .xx 日 xx 時 xx 分“ 時間特性 系統(tǒng)運行環(huán)境： e． PIII 450 Hz 以上處理器，內存不 少于 128M。 運行時間： 2s1min 適應性 在操作方式、運行環(huán)境、與其它軟件的接口以及開發(fā)計劃等發(fā)生變化時，應保持原有數 據的不被毀壞，丟失。 第七章 結束語 經過三個多月的畢業(yè)設計，互動留言簿系統(tǒng)基本開發(fā)完畢。 通過此次的畢業(yè)設計，從知識上來說我已經初步掌握了 、 、 ACCESS、DREAMWEAVER MX 的相關知識，在一定程度上具備獨立進行一個課題開發(fā)研究的能力，能夠積極主動的去學習新的知識，積極發(fā)現問題并探求解決問題的方法，特別是隨著 Microsoft公司 .NET戰(zhàn)略的進一步實施， .NET 技術必將引起新一輪的跨平臺軟件的開發(fā)浪潮，必將極其深刻的影響并改變人們的生活，掌握 技術無疑為今后的發(fā)展做出了堅實的鋪墊；從能力來說， ，通過此次畢業(yè)設計在姜老師的悉心教導下，通過自己不斷的學習鉆研，學習和研究了大量的 的書籍，并且充分利用互聯網絡所提供的便利，廣泛涉獵 ，自己的學習能力有了大幅度的提高。 由于畢業(yè)設計的時間較短又因為自己的時間和精力有限，加上自己是第一次編寫，顯得代碼層次較亂，在軟件功能上可能還存在某些不完整的地方，這都有待于進一步的改善，懇請姜老師及評閱教師指正。 在畢業(yè)設計期間， *老師本身擔負著很多重要繁重的工作，可是 *老師總是不厭其煩的解答我們的 問題，并專門擠出時間給同學們講解畢業(yè)設計所急需的專業(yè)知識。 第九章 參考文獻 [1] 王志偉，宋曉鵬主編 .突破 .北京：中國水利電力出版社， 2020年 [2] Chris Goode,John Kauffman et with Visual York:Wrox press Ltd， 2020 [3] 桂思強著 . .北京：中國 鐵道出版社， 2020年 [4] 王易編著 . 網站設計實例通 .北京：清華大學出版社， 2020年 [5] 林少景編著 . 編程百例通 . 北京：清華大學出版社， 2020年 [6] 姚普選編著 .數據庫原理及應用（ access 2020） . 北京：清華大學出版社， 2020年 [7] 肖建編 . 編程實例與技巧集粹 .北京：北京希望電子出版社， 2020年 [8] （美）巴茲拉等，黃開枝，王曉娜編著 . 安全性高級編程 .北京：清華大學出版社， 2020年 [9] （美）邁克，塞 溫編著 . WEB開發(fā) .北京：中國電力出版社， 2020年 [10] （美）巴西尤羅等，楊浩編著 . WEB 服務商級編程 — .北京：清華大學出版社， 2020年 [11] （美）凱森陳君編著 . 程序員查詢詞典 .北京：清華大學出版社， 2020年 [12] 麥中凡編著 . 編程入門 .北京：北京航空航天大學出版社， 2020年 [13] （美）米切爾的等編著 . 權威指南 .北京：中國電力出版社， 2020年 [14] 曾登高編著 ..NET系統(tǒng)架構與開發(fā) .北京：電子工業(yè)出版社， 2020年 [15] 胡海，程光耀編 .Dreanweaver Mx 標準教程 . 北京：北京希望電子出版社， 2020年 [16] 王克杰，劉敏編 . 中文版 Dreanweaver Mx 網頁制作入門及進階教程 . 北京：北京希望電子出版社， 2020年 [17] 孫趙林編 . Dreanweaver Mx 經典范例教程 . 北京：北京希望電子出版社， 2020年 [18] 雪之坊工作室編 .photoshop 中文版實例與技巧 .北京：中國鐵道出版社， 2020年 And what numberless and powerful causes tend to destroy these rare natures! What causes? In the first place there are their own virtues, their courage, temperance, and the rest of them, every one of which praise w orthy qualities (and this is a most singular circumstance) destroys and distracts from philosophy the soul which is the possessor of them. That is very singular, he replied. Then there are all the ordinary goods of life beauty, wealth, strength, rank, and great connections in the State you understand the sort of things these also have a corrupting and distracting effect. I understand。 you will then have no difficulty in apprehending the preceding remarks, and they will no longer appear strange to you. And how am I to do so? he asked. Why, I said, we know that all germs or seeds, whether vegetable or animal, when they fail to meet with proper nutriment or cl imate or soil, in proportion to their vigour, are all the more sensitive to the want of a suitable environment, for evil is a greater enemy to what is good than what is not. Very true. There is reason in supposing that the finest natures, when under alien conditions, receive more inj ury than the inferior, because the contrast is greater. Certainly. And may we not say, Adeimantus, that the most gifted minds, when they are illeducated, bee preeminently bad? Do not great crimes and the spirit of pure evil spring out of a fulness of nature ruined by education rather than from any inferiority, whereas weak natures are scarcely capable of any very great good or very great evil? There I think that you are right. And our philosopher follows the same analogy he is like a plant which, having proper nurture, must necessarily grow and mature into all virtue, but, if sown and planted in an alien soil, bees the most noxious of all weeds, unless he be preserved by some divine power. Do you really think, as people so often say, that our youth are corrupted by Sophists, or tha t private teachers of the art corrupt them in any degree worth speaking of ? Are not the public who say these things the greatest of all Sophists? And do they not educate to pe rfection young and old, men and women alike, and fashion them after their own hearts? When is this acplished? he said. When they meet together, and the world sits down at an assembly, or in a court of law, or a theatre, or a camp, or in any other popular resort, and there is a great uproar, and they praise some things which are being said or done, and blame other things, equally exaggerating both, shouting and clapping their hands, and the echo of the roc ks and the place in which they are assembled redoubles the sound of the praise or blame at such a time will not a young man39。 necessity will pel him. And yet, I said, there is a still greater necessity, which has not been mentioned. What is that? The gentle force of attainder or confiscation or death which, as you are aware, these new Sophists and educators who are the public, apply when their words are powerless. Indeed they do。 there neither is, nor has been, nor is ever likely to be, any different type of character which has had no other training in virtue but that which is supplied by public opinion I speak, my friend, of human virtue o