【正文】 要大于15cd/m2。在實際設(shè)計中，應(yīng)急照明常結(jié)合正常照明統(tǒng)一布置，利用正常照明燈的部分或全部作為應(yīng)急照明，當某場所發(fā)生火災(zāi)時，接通或保持應(yīng)急照明燈，指示人員疏散，同時，切斷有關(guān)部位的消防電源，防止電氣線路短路，方便撲救工作，但當人們已經(jīng)疏散撤離完，消防控制也應(yīng)將該場所應(yīng)急照明電源切斷，只保留帶蓄電池的應(yīng)急照明燈以維持必要持續(xù)時間的照明 便可，這樣可以完全減少救火人員觸電的可能性，更便于撲救。 （ 2）照明熄滅將造成系統(tǒng)運行、操作或工作無法繼續(xù)運行，從而導(dǎo)致很大的經(jīng)濟損失或不良影響的 場所，如通訊中心、電視臺、廣播電臺、鐵路或航空樞紐、發(fā)電站、中心變電站、重要的動力供應(yīng)站、城市供水設(shè)施，還有國家大會堂、國際會議中心、國際比賽場館、高級賓館等。 （ 1）備用照明應(yīng)與正常照明統(tǒng)一布置，以求經(jīng)濟、合理、整體協(xié)調(diào)?？梢杂米鞲黝悜?yīng)急照明燈，更多地用于疏散標志燈。電池的再充電時間不應(yīng)少于 24h。 逆變電路應(yīng)保證一定的流明效率。 電池放電終了時的電壓不應(yīng)低于額定電壓的 80%。 應(yīng)急照明燈數(shù)不多，規(guī)模小的建筑物可采用分散供電式系統(tǒng)，其余建筑，特別是高層建筑宜采用自啟動柴油發(fā)電機組作為應(yīng)急照明的主要供電方式或后備供電方式 (起動及投入運行時間小于 15s)，只對誘導(dǎo)指示照明，安全照明及金融商業(yè)交易場所等對轉(zhuǎn)換時間要求較高場所的備用照明，采用分散供電式的應(yīng)急照明燈具作為過渡照明，以滿足轉(zhuǎn)換時間的要求。應(yīng)急照明可包括疏散照明、安全照明和備用照明。所以，工程應(yīng)急照明系統(tǒng)的設(shè)計，不僅要滿足防火規(guī)范要求的火災(zāi)應(yīng)急照明系統(tǒng)的設(shè)置，還要滿足各個規(guī)范或標準對整體應(yīng)急照明系統(tǒng)的要求。在此衷心的祝愿老師們工作順利，身體健康！ 另外，還要感謝我們同組成員對我的關(guān)照。 the effor t to be even formally polite nearly strangled him. Even then the in spector was not brisk. He dis 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 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。 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。 my mother39。ve brought a tiny baby all that way !39。s voice, accepting the reproof in my mother39。s a lovely baby.39。t she? Isn39。 I am glad, my dear. Henry must be delighted.39。She was born a wee k ago. I didn39。ve got the certificate for her?39。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。 My aunt made no reply, but I thought I caught the sound of a suppressed sob. My mother said coldly, forcibly: 24 39。s such a little thing, you see. It39。 snapped my mother. 39。Monster!39。 She broke into little moanings. After a time my mother said: 39。 I39。s such a little thing. But I didn39。 tastes differed as much as their characters. Meg39。 in different colors on each, and the weekly newspaper called, The Pickwick Portfolio, to which all contributed som ething, while Jo, who reveled in pens and ink, was the editor. At seven o39。s what I39。t share it, independent, and don39。s self to fall back upon. At twenty five, girls begin to talk about being old maids, but secretly resolve that they never will be. At thirty they say nothing about it, but quietly accept the fact, and if sensible, console themselves by remembering that they have twenty more useful, happy years, in which they may be learning to grow old gracefully. Don39。. Jo must have fallen asleep (as I dare say my reader has during this little homily), for suddenly Laurie39。s Amy? Your mother has got her down at Meg39。s breath away, creeping in like a burglar, and letting cats out of bags like that? Get up, you ridiculous boy, and tell me all about it. Not a word, unless you let me e in my old place, and promise not to barricade. Jo laughed at that as she had not done for many a long day, and patted the sofa invitingly, as she said in a cordial tone, The old pillow is up garret, and we don39。s eye plainly betrayed that she found her boy elier than ever. The pillow was gone, but there was a barricade, neverthel。! No one ever calls me that but you. And Laurie sat down with an air of great content. What does Amy call you? My lord. That39。ve done it. And he looked so guilty that Jo was down on him like a flash. You39。t like to show it. But, like Jenny in the ballad... She could not think it he, and lay staring up at him in startled silence, till he stooped and kissed her. Then she knew him, and flew up, crying joyfully . .. Oh my Teddy! Oh my Teddy! Dear Jo, you are glad to see me, then? Glad! My blessed boy, words can39。s sight. Even the sad, sour sisters should be kindly dealt with, because they have missed the sweetest part of life, if for no other reason. And looking at them with passion, not contempt, girls in their bloom should remember that they too may miss the blossom time. That rosy cheeks don39。t be a sour saint nor a selfish sinner, and, I dare say, old maids are very fortable when they get used to it, but... And there Jo sighed, as if the prospect was not inviting. It seldom is, at first, and thirty seems the end of all things to f iveandtwenty. But it39。m old and c an39。t, was Nathaniel Winkle. Pickwick, the president, read the paper, which was filled with original tales, poetry, local news, funny advertisements, and hints, in which they goodnaturedly reminded each other of their faults and short ings. On one occasion, Mr. Pickwick put on a pair of spectacles without any glass, rapped upon the table, hemmed, and having stared hard at Mr. Snodgrass, who was tilting back in his chair, till he arranged himself properly, began to read: Jo was alone in the twilight, lying on the old sofa, looking at the fire, and thinking. It was her favorite way of spending the hour of dusk. No one disturbed her, and she used to lie there on Beth39。s bed was never alike two seasons, for she was always trying experiments. This year it was to be a plantation of sun flowers, the seeds of which cheerful land aspiring plant were to feed Aunt Cockletop and her family of chicks. Beth had oldfashioned fragrant flowers in her garden, sweet peas and mignote, larkspur, pinks, pansies, and southernwood, with chickweed for the birds and catnip for the pussies. Amy had a bower in hers, rather small and earwiggy, but very pretty to look at, with honeysuckle and morningglories hanging their colored horns and bells in graceful wreaths all over it, tall white lilies, delicate ferns, and as many brilliant, picturesque plants as would