【導讀】郵件等簡單的網(wǎng)絡(luò)應(yīng)用。高速發(fā)展的互聯(lián)網(wǎng)技術(shù)為網(wǎng)上購物系統(tǒng)的發(fā)展提供了強。大的動力，同時，網(wǎng)上購物的環(huán)境已經(jīng)逐步得到了改善。網(wǎng)上購物對網(wǎng)民的吸引。接受，從懷疑到信任，網(wǎng)上購物的觀念將更加深入人心。滿意的商品加入購物車。顧客購買完商品后，會得到系統(tǒng)自動分配的一個唯一的

　　

【正文】 ]．北京：電子工業(yè)出版社 ,。 第 26 頁 共 25 頁 致 謝 本文是在閆麗麗老師的熱情關(guān)心和指導下完成的，她 淵博的知識和嚴謹?shù)?治學作風使我受益匪淺，對順利完成本課題起到了極大的作用。在此向她 表示我最衷心的感謝！ 最后向在百忙之中評審本文的各位專家、老師表示衷心的感謝！ 作者簡介 姓名： 葉凱 性別：男 出生年月： 1984 年 10 月 29 日 民族： 漢族 Email： 第 27 頁 共 25 頁 聲 明 本論文的工作是 2020 年 02 月至 2020 年 06 月在成都信息工程學院網(wǎng)絡(luò)工程系完成的。文中除了特別加以標注地方外，不包含他人已經(jīng)發(fā)表或撰寫過的研究成果，也不包含為獲得成都信息工程學院或其他教學機構(gòu)的學位或證書而使用過的材料。除非另有說明，本文的工作是原始性工作。 關(guān)于學位論文使用權(quán)和研究成果知識產(chǎn)權(quán)的說明 本人完全了解成都信息工程學院有關(guān)保管使用學位論文的規(guī)定 ，其中包括： （ 1）學校有權(quán)保管并向有關(guān)部門遞交學位論文的原件與復印件。 （ 2）學?？梢圆捎糜坝?、縮印或其他復制方式保存學位論文。 （ 3）學?？梢詫W術(shù)交流為目的復制、贈送和交換學位論文。 （ 4）學?？稍试S學位論文被查閱或借閱。 （ 5）學?？梢怨紝W位論文的全部或部分內(nèi)容（保密學位論文在解密后遵守此規(guī)定）。 除非另有科研合同和其他法律文書的制約，本論文的科研成果屬于成都信息工程學院。 特此聲明！ 作者簽名： 2020 年 6 月 日 第 28 頁 共 25 頁 d the whale municate over hundreds of miles? How did it use echoes to find its prey in the ocean gloom, to stun fish, diagnose illness in another whale? Que stionsto which the answers could prove invaluable. But instead of learning, men threatened to wipe the species out. Aboard the catcher boat no such thoughts crossed the gunner39。s mind. He was busy trying to solve a sixty foot, sixty ton problem: a sperm whale that refused to give up. The harpoon had not found the vital spotthe gunner blamed the choppy sea for spoiling his aimand now the whale was towing the 110 ton boat behind it. Even with the engine reversed, the craft kept moving forward. The gunner got ready to fire a second harpoon. In the bloodstained water the mammoth beast continued its agonising struggle. He was a mature male, a bull. His slateblue body bore scars, souvenirs of epic battles with giant squid he had hunted in the dark depths. The biggest of these pink monsters, whose humanlike eyes were more than fifteen inches across, weighed 42 tons and measured 66 feet. But even the ir powerful beaks and ten suc kered tentacles were no match for the whale39。s eightinch teeth. ted on the shore. Someone set it ablaze. Spar ks crackled amid whirling smoke. Excited, cherry cheeked children ringed the bonfire。 only the older ones understood that this was no celebration. For several nights to e there would be plenty of bodies to feed the flames. Niy miles inland, nothing broke the forest hush. A full moon silvered the treetops and light leaked down to the snowcovered floor beneath. Scraps of mist seemed caught on prickly branches. From the shadows, a ghostly shape glided into a clearing. Tw o amber eyes searched the dappled darkness. Stealthily the wolf a dvanced. Hunger had driven h im from his snug den. He knew where to find a good meal. Not the mice and birds he had lived on lately, but a hare he had killed and buried in the frozen ground to keep it fresh and safe from crows and ravens. As the dogwolf wound through the trees at an effortless lope, which could carry him as far as 120 miles in a single day, his thic k browngrey yellow fur gleamed in the moonlight. He was a fine big dog:owdered horn cured colds, measles, nosebleeds, vomiting, heart weakness. The Japanese claimed it fought fever. Certain people even swore by it as a love potion. Most poachers are poor. So the temptation to earn money by any means, however risky, is very strong. They may work as farmer s for ?00 a year less than they39。d be paid for a single horn. A m erchant will sell it to consumers for ?5,000 and upwards. More slides followed. A chimpanzee. Valued at ?,300 on the black market. Much in demand for biomedical research, travelling acts, photography, tourist attractions and the television and film industries. A hyacinth macaw. Going price ?,500 to an avid collector. A peregrine falcon. Bought by Arab falconers for ?,000 each. Seeing the peregrine, Gary fot everything else. His favourite bird! It could swoop at over two hundred miles an hour, spot its prey more than five miles away. Peregrines had once nearly died out in Britain through eating pigeons which had fed on grain sprayed with pe sticides ... Bellingham39。s voice broke into the boy39。s reverie. He was talking about Amazon dolphins. These gentle creatures, already threatened by pollution and riverdamming schemes, were being killedtheir eyeballs sold as ornaments and lucky charms in cities such as Rio de Janeiro. Gary grunted disgustedly, and Susan39。s face showed her feelings. The naturalist then mentioned another charming practice: eating bear paws. Considered a delicacy in Japan, Taiwan, Hong Kong and Singapore, the paws of hunted bears are imported from China. The wildlife trade is a worldwide business, w orth billions of pounds. There are strict rules to control that trade. However, some countries don39。t agree to them. Others say they do, but allow croo ks and cheats to get away with murderanimal murder. That39。s just one of the reasons why The Eden Mission is a top priority ... Bellingham glanced quickly at his watch. I see time is running out. A few final words. Sea Shepherd39。s programme includes try ing to save grey whales and sea otters from oil pollution off California。 第 29 頁 共 25 頁 manatees from being chopped up by speedboat propellers in Florida39。s waterways。 Amazon dolphins from extermination. We have other tasks too, which I can39。t go into now. The six youngsters sailing with Sea Shepherd, all keen conservationists, will make a valuable contribution. But they39。ll also have to continue the ir school studies ... Someone in the audience groaned. Ben grinned broadly. Thank you for listening, ladies and gentlemen. Wish us luck! Loud applause. Then he answered lastminute questions from journalists. The audienceclad once more in raincoats, and clutching umbrellasbegan to file out. Parents hugged their children