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已知实数m.n满足m^2-7m+2=0,n^2-7n+2=0,求代数式n/m+m/n的值 Operating System怎么读 源源不断造句好一点的,短一点的! 用源源不断造句 微生物反应过程中为什么水很重要 一道初3二次函数综合题 解出后给100分.平面直角坐标系中,点A(-1.0),B(4.0),C(3.2),D(0.2),E(1.0),F(1.-1)抛物线过点ABCD,解析式为y=-1/2*x^2+3/2*x+2.(1)若直线y=kx-1(k≠0)将四边形AECD面积二等分,求k的值.(2)将四 英语翻译1.William (Bill) H.Gates is chairman of Microsoft Corporation,the worldwide leading provider of software for personal computer.2.Gates attended public elementary school and the private Lakeside School where he discovered his interest in s 7.22日食,福建省看得到吗?听说日食不能去看,会伤害到眼睛,真的么?带墨镜可以观看么 0 英语翻译1.William (Bill) H.Gates is chairman of Microsoft Corporation,the worldwide leading provider of software for personal computer.2.Gates attended public elementary school and the private Lakeside School where he discovered his interest in s 2009年7月22日福建莆田地区可以看到日食吗?具体时间是多少?那时间呢？ 英语翻译1.William (Bill) H.Gates is chairman of Microsoft Corporation,the worldwide leading provider of software for personal computer.2.Gates attended public elementary school and the private Lakeside School where he discovered his interest in s please help me look after my pet dog at home.（同义句转换）the young man went to a factory in order to make some money.（同义句转换） YOU CAN LOOK AFTER HIS DOG TO HELP HIM怎么改为同义句做不来 这次日食福建泉州这边看偏食的时间是什么时候` 22号日食在福建泉州什么时候 在福建能看到日食吗在附件漳州能看到吗?日偏食也好啊,有没有? 8月1日 日食时间泉州几点能看到? 初一数学题,急!高手进!谢谢啦在同一平面内,有三个角∠AOB、∠BOC、∠AOC,它们的和为60°,且已知∠BOC比∠AOB大10°,∠AOC比∠BOC大10°,求∠AOB、∠BOC、角AOC的度数. 证明二次函数f(x)=ax^2+bx=c(a这未免太投机了吧，换一个，用代数式证 倾诉怎么造句 用倾诉造句,正常点的……… 用倾注,倾诉造句 用词语 想象 雾 倾诉造句 造个欢快的 和一个悲伤的 第七小题, 一种饮料标签上写着100%果汁,100%果汁的意思是( 求百分百正确 正确率百分百 7小题, 第七题和第五题,绝对给好评的,一定要有过程,线等 letting 组织培养中二次灭菌法是什么? I am ( )for a week .could you help ma look after my pet dagA.away B.back C.along D.down2.还有疑问：They are so much stress that they ( )study herd every day .A.would B.should C .can D.must我选C错了，（我的悬赏金额有点少了。）