【導(dǎo)讀】當(dāng)前，網(wǎng)絡(luò)教學(xué)方興未艾。網(wǎng)上考試已在其中扮演了重要的角色，傳統(tǒng)試。卷考試方式有待提高。網(wǎng)絡(luò)教學(xué)已從其規(guī)范性、科學(xué)性及考試工作組織、管理。的統(tǒng)一性，影響到教學(xué)質(zhì)量的好壞?；诖耍鞠到y(tǒng)開發(fā)實現(xiàn)了基于B/S模式。具是eclipse+myeclipse，服務(wù)器采用tomcat。在線考試模塊包括學(xué)生登錄、考試鑒權(quán)、考試時間控。制和一些簡單的考試意外的避免。自動評分模塊包括制定評分規(guī)則自動評分和。用戶機(jī)則不需要安裝任何應(yīng)用程序直接通過瀏覽器就可以訪問。效率，以及保證了考試的公平性、答案的安全性。

　　

【正文】 。文中除了特別加以標(biāo)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(xué)院或其他教學(xué)機(jī)構(gòu)的學(xué)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(xué)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(xué)院有關(guān)保管使用學(xué)位論文的規(guī)定，其中包括： （ 1）學(xué)校有權(quán)保管并向有關(guān)部門遞交學(xué)位論文的原件與復(fù)印件。 （ 2）學(xué)校可以采用影印、縮印或其他復(fù)制方式保存學(xué)位論文。 （ 3）學(xué)校可以學(xué)術(shù)交流為目的復(fù)制、贈送和交換學(xué)位論文。 （ 4）學(xué)?？稍试S學(xué)位論文被查閱或借閱。 （ 5）學(xué)校可以公布學(xué)位論文的全部或部分內(nèi) 容（保密學(xué)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(xué)院。 特此聲明！ 作者簽名： 2020年 6月 9日 第 27 頁 共 26 頁 ooling? Cirocco frowned from one picture to the other. Just a lot of little black dots to me. Well, yeah. You can39。t see anything without the parometer. That39。s it right there. She indicated an area with her little %er. Let39。s go take a look. Cirocco rummaged through her locker and found a peagreen shipsuit that smelled as good as any of them. Most of the handy velcro patches were peeling. Her room was at the bottom of the carousel, midway between ladders three and four. She followed Gaby around the curving floor, then pursued her up the ladder. Each rung was a little easier than the last until, at the hub, they were weightless. They pushed off from the slowly r otating ring and drifted down the central corridor to the science module. SCIMOD in NASAese. It was kept dar k to make the instruments easier to read, and was as colourful as the inside of a juke box. Cirocco liked it. Green lights blinked and banks of television screens hissed white noise through confetti clouds of snow. Ugene Springfield and the Polo sisters floated around the central holo tank. Their faces wer e bathed in the red glow. Gaby handed the plates to the puter, punched up an imageintensifying program, and indicated the screen Cirocco should watch. The pictures were sharpened, bined, then rapidly alternated. Two miniscule dots blinked, not far from each other. There it is, Gaby said proudly. Small proper motion, but the plates are only twenty three hours apart. Gene called to them. Orbital elements are ing in, he said. Gaby and Cirocco joined him. Cirocco glanced down and saw his arm go possessively around Gaby39。s waist, looked quickly away, noting that the Polo sisters had seen it and were just as careful not to notice. They had all learned to stay out of each other39。s affairs. Saturn sat in the middle of the tank, fat and brassy. Eight blue circles were drawn around it, each larger than the last, eac h in the equatorial plane of the rings. There was a sphere on each circle, like a single pearl on a string, and beside the pearls were names and numbers: Mnemosyne, Janus, Mimas, Enceladus, Tethys, Dione, Rhea, Titan, and Hyperion. Far beyond those orbits was a tenth one, visibly tilted. That was Iapetus. Phoebe, the most distant, could not be shown on the scale they were using. Now another circle was drawn in. It was an eccentric ellipse, almost tangent to the orbits of Rhea and Hyperion, cutting right across the circle that represented Titan. Cirocco studied it, then straightened. Looking up, she saw deep lines etched on Gaby39。s forehead as her fingers flew over the keyboard. With each pro gram she called up, the numbers on her screen changed. It had a very close call with Rhea about three million years ago, she noted. It39。s safely above Titan39。s orbit, though perturbations must be a factor. It39。s far f rom stabilized. Meaning what? Cirocco asked. Captured asteroid? Gaby suggested, one eyebrow raised doubtfully. The proximity to the equatorial plane would make that un likely, one of the Polo sisters said. April or August? Cirocco wondered. After eighteen months together she still couldn39。t tell them apart. I was afraid you39。d see that. Gaby chewed a knuckle. Yet if it was formed with the others, it ought to be less eccentric. The Polo shrugged. 39。There are ways to explain it. A catastrophic event in the recent past. It Bill39。s tongue had started a t Cirocco39。s toes and was now exploring her left car. She liked that. It had been a memorable journey. Cirocco had loved every centimeter of it。 some of the stops along the way had been outrageous. Now he was worrying her earlobe with his lips and teeth, tugging gently to turn her around. She let it happen. He nudged her shoulder with his chin and nose to get her turning faster. She began to rotate. She feltw what he was doing. She locked her legs a round his hips and let him do the moving. Bill was forty, the oldest of the crew, and had a face dominated by a lumpy nose and jowls that could have graced a bassett hound. He was balding and his teeth were not pretty. But his body was lean and hard, ten years younger than his face. His hands were neat and clean, precise in their movements. He was good with machinery, but not the greasy, noisy kind. H is tool kit would fit in his shirt poc ket, tools so tiny that Cirocco wouldn39。t dare handle them. His delicate touch paid off when he made love. It was matched by his gentle disposition. Cirocco wondered why it had taken her so long to find him. There were three men aboard Ringmaster, and Cirocco had made love to them all. So had Gaby Pla was taller than most of them. She thought it was more in his eyes, which were soft and brown and liquid. And his smile. Those eyes and that smile had done nothing for Gaby, just as Cirocco39。s charms had not interested Gene, her second choice. Mat are you smiling about? Bill asked. Don39。t you think you39。re giving me enough reason? she countered, a little breathlessly. But the truth was she had been thinking of how amusing the four of them must have looked to Bill, who had stayed out of the shuffle of bodies. That seemed to be his style, to sit back and let people sor t themselves out, then move in when it began to be depressing. Calvin had certainly been depressed. So had Cirocco. Whether from preoccupation with Gaby or just inexperience, Calvin had not been much of a lover. Cirocco thought it was a little of both.