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已知直线 l1：(m^2－m－2)x＋2y＋m－2＝0,l2：2x＋(m－2)y＋2＝0,当m为何值时,l1平行于l2? 我不会计算, 朝花夕拾的主要思想 简短点的. 帮我算算,我不会算0次方(√3一1)的2次方一(π十1)的O次方 怎么巧算, 朝花夕拾 推荐理由50 朝花夕拾 那篇文章最简单?鲁迅朝花夕拾中除了《从百草园到三味书屋》、《阿长与山海经》和《藤野先生》的七篇文章中,哪篇写的好（好句好段摘抄）,哪篇容易写读书笔记? 三国中的典故和成语? 有谁知道三国演义中的成语及其典故（短一点的）?注：不要望梅止渴、三顾茅庐、七擒七纵、空城计 一钢球在光滑水平面上以10m/s的速度撞向墙壁,碰到墙壁经0.1s后以8m/s的速度被反向弹了回来.设钢球撞向墙壁时的方向为正方向,则钢球在碰撞这段时间内的平均加速度是( )A.20 m/s2,方向与 三国中的典故和成语有哪些呢 有关三国人物的典故的成语 Write one of your favourite holidays or festival in China. 一个英语句子分析的小问题 Never again could she lie down,as a child,secure beneath her father's roof with the protection of his mother's love warpped about her like an eiderdown quilt.这里去掉插入语 as a child 还原后 应该是： 脚字开头的成语 脚开头的成语是非得失v 英语翻译insurance policy in 3 copies for 110% of the invoice value showing claims payable in China in currency of the draft,balnk endorsed. 英语翻译Availablewith Issuing Bank by acceptance of your draft drawn on us at 30 days aftersight against presentation of the following documents:Full set of 3/3 original plus 2/2 copies of clean “on board”ocean/marine Bills of Lading,original 求翻译,来自信用证的句子kindly acknowledce receipt of this message by swift and also advise us of the unutilized balance at 高中数学怎样学? 英语翻译1.Negotiation of documents is restricted to the nominated bank in field 41A SUB-ARTICLE 12(B)OF UCP600 IS EXCLUDED2.Negotitation of documents under reserve or against bank guaranree/indemnity is prohibeted 这两句话可以怎么理解?B 求翻译信用证,急40A：Type of Documentary CreditIRREVOCABLE-20：Letter of Credit NumberLC84E0081/99-31G：Date of Issue99091642C:Date and Place of Expiry991015 59:BeneficiarySANGYONG CORPORATION CPO BOX 110SEOULKOREA32B:Currency Code, Amount U 英语翻译credit available with any bank by negotiation against the documents detailed herein and benefiary's draft for 90% of invoice value at sight on us SAT改进句子题Behind the house there is just one broken-down shed and one pile of rubble that need to be carted away.划线部分为 there is just one broken-down shed and one pile of rubble thatA.there is just one broken-down shed and one pile o 几道英汉互译请教一下.（初二牛津）[每空一词]及时____________在拐角处（室外）______________自从那时起 _______ then或from ______ on或ever _______喜爱 care ______因某事祝贺某人!Congratulations ______ sb._____ 在3,15,20,60,7,28,120中,60的因数有什么,7的倍数有什么 英语翻译Than the mentioned above en route to Saudi ArabiaWritten on the day of …2007Sworn to before me on the day of..2007Notary or C.C.P.I.T.signature of vessels Seal and signature of agent,owner,captain or CO.Note:this certificate is not requ 英语翻译时间紧急 英语翻译DOCUMENTS MUST BE DESPATCHED BY COURIER SERVICE IN ONE COVER TO THE HONGKONG AND SHANGHAI BANKING CORPORATION LIMITED,2ND FLOOR,HSBC BUILDING MONGKOK,673 NATHAN ROAD,MONGKOK,KOWLOON,HONGKONG ATTN：TRADE AND SUPPLY DEPT.EXPENSES INCURRED 平时说话,用到逻辑学知识了吗? sat句子改进 sat句子改进 杨梅的叶子像什么?