【導讀】隨著的飛速發(fā)展，網(wǎng)絡已經(jīng)成為人們學習，工作，生活不可缺少的一部分。而局域網(wǎng)則是在網(wǎng)絡的另一個層次上為學習工作和生活提拱了很多便利。起一個組織內部的獨立的計算機，使人們可以方便快捷的訪問信息和獲取資源。Web源于靜態(tài)文本，現(xiàn)在很多站點還是采用這種方式。是維護難、查詢難、修改難。雖說可以采用Dreamweaver對站點。進行管理，但這只是其中的一個辦法。庫，動態(tài)生成超文本。這樣，要改變式樣，只需修改幾個文件，要變更內容，應用，這種方式的優(yōu)越性就更為突出。都應當有相當清晰的了解和認識。數(shù)據(jù)庫應用系統(tǒng)開發(fā)的目標是建立一個滿足用。戶長期需求的產品。開發(fā)的主要過程為：理解用戶的需求，然后，把它們轉變?yōu)?。有效的?shù)據(jù)庫設計。把設計轉變?yōu)閷嶋H的數(shù)據(jù)庫，并且這些數(shù)據(jù)庫帶有功能完備、數(shù)據(jù)庫技術在計算機軟件鄰域研究中一直是非常重要的主

　　

【正文】 s mounted in a leisurely fashion, and strolled into the house, chatting about the weather. Father, red in the face, handed him over to Mary who took him along to mother39。s room. Then followed the worst wait of all. Mary said afterwards that he hummed and ha39。d for an unconscionable time while he examined the baby in minutest detail. At last, however, he emerged, with an expressionless face. In the littleused sittingroom he sat down at the table and fussed for a while about getting a good point on his quill. At last he took a form from his pouch, and in a slow, deliberate hand wrote that he officially found the child to be a true female human being, free from any detectable form of deviation. He regarded that thoughtfully for some moments, as though not perfectly satisfied. He let his hand hesitate before he actually dated and signed it, then he sanded it carefully, and handed it to my enraged father, still with a faint air of uncertainty. He had, of course, no real doubt in his mind, or he would have called for another opinion。 my father was perfectly well aware of that, too. At last Petra39。s existence could be admitted. I was formally told that I had a new sister, and presently I was taken to see he r where she lay in a crib beside my mother39。s bed. She looked so pink and wrinkled to me that I did not see how the inspector could have been quite sure about her. How ever, there was nothing obviously wrong with her, so she had got her certificate. Nobody could blame the inspector for that。 she did appear to be as normal as a newborn baby ever looks. ... While we were taking turns to look at her somebody started to ring the stable bell in the customary way. Everyone on the farm stopped work, and very soon we were all assembled in the kitchen for prayers of thanksgiving. Two, or it may have been three, days after Petra was born I happened upon a piece of my family39。s history that I would prefer not to have known. I was sitting quietly in the room next to my parents39。 bedroom where my mother still lay in bed. It was a matter of chance, and strategy, too. It was the latest place that I had found to stay hidden awhile after the midday meal until the coast was clear and I could slip away without being given an afternoon job。 so far, nobody had thought of looking there for me. It was simply a matter of putting in half an hour or so. Normally the room was very convenient, though just at present its use required caution because the wattle wall between the rooms was cracked and I had to move very cautiously on tiptoe lest my mother should hear me. On that particular day I was just thinking that I had allowed nearly enough time for people to be busy again when a twowheeled trap drove up. As it passed the w indow I had a glimpse of my Aunt Harriet holding the reins. I had only seen her some eight or nine times, for she lived fifteen miles away in the Kentak direction, but what I knew of he r I liked. She was some three years younger than my mother. Superficially they were not dissimilar, and yet, in Aunt Harriet each feature had been a little softened, so that the effect of them all together was differe nt. I used to feel when I looked a t her that I was seeing my mother as she might have been — as, I thought, I would have liked her to be. She was easier to talk to, too。 she did not have a somewhat damping manner of listening only to correct. I edged over carefully on stoc kinged feet to the window , watched her tether the horse, pic k a white bundle out of the trap, a nd carry it into the house. She cannot have met anyone, for a few seconds later her steps passed the door, and the latch of the next room clicked. 39。Why, Harriet!39。 my mother39。s voice exclaimed in surprise, and not altogether in approval. 39。 So soon! You don39。t mean to say you39。ve brought a tiny baby all that way !39。 39。I know,39。 said Aunt Harriet39。s voice, accepting the reproof in my mother39。s tone, 39。but I had to, Emily. I had to. I heard your baby had e early, so I — oh, there she is! Oh, she39。s lovely, Emily. She39。s a lovely baby.39。 There was a pause. Presently she added: 39。 Mine39。s lovely, too, isn39。t she? Isn39。t she a lovely darling?39。 There was a certain amount of mutual congratulation which did not interest me a lot. I didn39。t suppose the babies looked much different from other babies, really. My mother said: 39。 I am glad, my dear. Henry must be delighted.39。 39。Of course he is,39。 said Aunt Harriet, but there was something wrong about the way she said it. Even I knew that. She hurried on: 39。She was born a wee k ago. I didn39。t know what to do. Then when I heard your baby had e early and was a girl, too, it was like God answering a prayer.39。 She paused, and then added with a ca sualness which somehow failed to be casual: 39。You39。ve got the certificate for her?39。 39。 Of course.39。 My mother39。s tone was sharp, ready for offence. I knew the expression which went with the tone. When she spoke again there was a disturbing quality in her voice. 39。Harriet!39。 she demanded sharply. 39。Are you going to tell me that you have not got a certificate?39。 My aunt made no reply, but I thought I caught the sound of a suppressed sob. My mother said coldly, forcibly: 39。 Harriet, let me see that child — properly.39。 For some seconds I could hear nothing but another sob or two from my aunt. Then she said, unsteadily : 39。 It39。s such a little thing, you see. It39。s nothing much.39。 39。Nothing much!39。 snapped my mother. 39。You have the effrontery to bring your monster into my house, and tell me it39。s nothing much!39。 39。Monster!39。 Aunt Harriet39。s voice sounded as though she had been slapped. 39。Oh! Oh! Oh! ...39。 She broke into little moanings. After a time my mother said: 39。 No wonder you didn39。t dare to call the inspector.39。 Au