【文章內(nèi)容簡介】 的作用是從訪問Web 站點的用戶那里獲得信息。訪問者可以使用諸如文本域、列表框、復選框以及單選按鈕之類的表單對象輸入信息，然后單擊某個按鈕提交這些信息。使用行為判斷文本域中是否輸入的為數(shù)字，窗口如下第12章Internet資源的利用一、單選題1. A2. B3. C4. D5. B6. A二、多選題三、判斷題1. 對2. 錯四、回答問題1. 答：Google提供常規(guī)及高級搜索功能。該引擎允許用戶定制搜索結(jié)果頁面所含信息條目數(shù)量。提供網(wǎng)站內(nèi)部查詢和橫向相關(guān)查詢。Google還提供特別主題搜索。Google允許以多種語言進行搜索。搜索結(jié)果顯示網(wǎng)頁標題，鏈接(URL)及網(wǎng)頁字節(jié)數(shù)，匹配的關(guān)鍵詞以粗體顯示。其他特色功能包括“網(wǎng)頁快照”(Snap Shot)。Google借用Dmoz的目錄索引提供分類目錄查詢。百度搜索引擎的功能特點包括：基于字詞結(jié)合的信息處理方式。支持主流的中文編碼標準。智能相關(guān)度算法。檢索結(jié)果能標示豐富的網(wǎng)頁屬性，并突出用戶的查詢串，便于用戶判斷是否閱讀原文。支持二次檢索。相關(guān)檢索詞智能推薦技術(shù)。運用多線程技術(shù)、高效的搜索算法、穩(wěn)定的UNIX平臺、和本地化的服務(wù)器，保證了最快的響應速度?？梢蕴峁┮恢堋⒍?、四周等多種服務(wù)方式。檢索結(jié)果輸出支持內(nèi)容類聚、網(wǎng)站類聚、內(nèi)容類聚+網(wǎng)站類聚等多種方式。支持用戶選擇時間范圍，提高用戶檢索效率。智能性、可擴展的搜索技術(shù)保證最快最多的收集互聯(lián)網(wǎng)信息。擁有目前世界上最大的中文信息庫，為用戶提供最準確、最廣泛、最具時效性的信息提供了堅實基礎(chǔ)。分布式結(jié)構(gòu)、精心設(shè)計的優(yōu)化算法、容錯設(shè)計保證系統(tǒng)在大訪問量下的高可用性、高擴展性、高性能和高穩(wěn)定性。高可配置性使得搜索服務(wù)能夠滿足不同用戶的需求。先進的網(wǎng)頁動態(tài)摘要顯示技術(shù)。獨有百度快照，巧妙解決了搜索用戶經(jīng)常遇到的死鏈接問題。支持多種高級檢索語法，使用戶查詢效率更高、結(jié)果更準。北大“天網(wǎng)”搜索引擎的特點包括：一、在語種上支持中英文搜索。國內(nèi)大部分的搜索引擎都只收錄中文網(wǎng)站，而“天網(wǎng)”可以用來查找國內(nèi)的英文網(wǎng)站。二、在文件格式上既支持文件傳輸格式，又支持FTP文件傳輸格式。天網(wǎng)將FTP文件分成電影、動畫片，mp3音樂，程序下載及開發(fā)資源共四大類，用戶可以象目錄導航式搜索引擎那樣層層點擊下去查找自己需要的FTP文件。Yahoo分類目錄查詢做得相當出色，無論從網(wǎng)站的數(shù)量還是分類的合理性方面都可圈可點。站點目錄分為14個大類，每一個大類下面又分若干子類，搜索十分方便。該站點連接速度快，包含范圍廣，數(shù)據(jù)容量大，簡便易用。雅虎中國網(wǎng)站為用戶提供了強大的搜索功能，通過其14類簡單易用、手工分類的簡體中文網(wǎng)站目錄及強大的搜索引擎，用戶可以輕松搜索到政治、經(jīng)濟、文化、科技、房地產(chǎn)、教育、藝術(shù)、娛樂、體育等各方面的信息。2. 答：搜索引擎技術(shù)未來的幾個發(fā)展動向包括：十分注意提高信息查詢結(jié)果的精度，提高檢索的有效性?；谥悄艽淼男畔⑦^濾和個性化服務(wù)。采用分布式體系結(jié)構(gòu)提高系統(tǒng)規(guī)模和性能。重視交叉語言檢索的研究和開發(fā)。注意搜索引擎技術(shù)和其它信息技術(shù)的相互借鑒。重視學術(shù)研究。上機實驗習題1. 歌詞如下，因是民歌，作詞及作曲者不詳。2. “+2006級，北京大學，計算機系”3. 略。4. 略。5. 略。62（英文版 ） Two regulations promulgated for implementation is in the party in power for a long time and the rule of law conditions, the implementation of prehensive strictly strategic plan, implementation in accordance with the rules and discipline to manage the party, strengthen innerparty supervision of major initiatives. The two regulations supporting each other, the code adhere to a positive advocate, focusing on morality is of Party members and Party leading cadres can see, enough to get a high standard。 rule around the party discipline, disciplinary ruler requirements, listed as negative list, focusing on vertical gauge, draw the party organizations and Party members do not touch the bottom line . Here, the main from four square face two party rules of interpretation: the first part introduces two party Revised regulations the necessity and the revision process。 the second part is the interpretation of the two fundamental principles of the revision of laws and regulations in the party。 the third part introduces two party regulations modified the main changes and needs to grasp several key problems。 the fourth part on how to grasp the implementation of the two regulations of the party. code and Regulations revised the necessity and revised history of the CPC Central Committee the amendment to the Chinese Communist Party members and leading cadres honest politics several guidelines and Chinese Communist Party discipline and Punishment Regulations column 1 by 2015 to strengthen party laws and regulations focus. Two party regulations revision work lasted a Years, pooling the wisdom of the whole party, ideological consensus, draw historical experience, respect for the wisdom of our predecessors, which reflects the unity of inheritance and innovation。 follow the correct direction, grasp the limited goals, adhere to the party39。s leadership, to solve the masses of the people reflect a focus on the problem. The new revision of the code and rule , reflects the party39。s 18 and the eighth session of the third, the spirit of the fourth plenary session, reflecting the experience of studying and implementing the General Secretary Xi Jinping series of important speech, reflects the party39。s eighteen years prehensive strictly practice. (a) revised two regulations of the party need of the ICAC guidelines in in 1997 Leaders as members of the Communist Party of China clean politics certain criteria (Trial) based on revised, the promulgation and implementation of January 2010, to strengthen the construction of the contingent of leading cadres play an important role. But with the party to manage the party strictly administering the deepening, has not been able to fully meet the actual needs. Content is too plicated, eight prohibition, 52 are not allowed to hard to remember, and also difficult to put into practice。 the second is concisely positive advocated by the lack of prohibited provisions excessive, no autonomy requirements。 the third is banned terms and discipline law, both with the party discipline, disciplinary regulations repeat and Criminal law and other laws and regulations repeat。 the fourth is to clean the theme is not prominent, not for the existing problems, and is narrow, only needle of countylevel leading cadres above. rule is in 1997 Chinese Communist Party disciplinary cases (Trial) based on revision, in December 2003 the promulgation and implementation, to strengthen the construction of the party play very important role. Along with the development of the situation, which many provisions have been unable to fully meet the prehensive strictly administering the practice needs. One is Ji law, more than half of the provisions and criminal law and other countries laws and regulations Repetition。 two is the political discipline regulations is not prominent, not specific, for violation of the party constitution, damage the authority of Party Constitution of misconduct lack necessary and serious responsibility to pursue。 third is the main discipline for the leading cadres, does not cover all Party members. Based on the above situation, need to the criterion of a clean and honest administration and rule the two is likely to be more relevant regulations first amendment. By revising, really put the authority of Party discipline, the seriousness in the party tree and call up the majority of Party members and cadres of the party constitution of party passes party consciousness. (II) two party regulations revision process the Central Committee o