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• Why not ta___ a holiday to visit *
• 一个物理题 要过程 会的帮忙答一下 谢谢 很急!右表是一张“的士”车票,根据车票上的有关数据可知该乘客共在该 “的士”上坐了多少分钟?,在此时间内,该车的平均速度是 多少km/h?.若前3公里车价是8元人民币,则3公里以后汽车每行驶1公里需人民币多少元.? TAXT车票发票车号:TA—2376日期:04—01—16上车:9:24下车:9:36里程:10公里金额:17.8元?
• 设f（x）=｛x²（x≥1）；1/x（x＜1）,则方程af²（x）+bf（x）+c的解的个数不可能是4.向量a,b是两个已知向量,t是实数变量,当向量ta+（t-1）b的模最小时,t的值是C.A.（a+b）b B.(b+a)a C.【（a+b）*b】/(a+b) ² D.【（a+b）*a】/(a+b) ²已知抛物线C的焦点为F（3,-2）,准线为l：3x-4y+1=0,A(7,-5),P是C上的动点,则P到A,F两点的距离之和的最小值是42/5
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• 英语翻译A good memory is a great help in learning a language.Everybody learns his own language by remembering what he hears when he is a small child.Some boys and girls who live in foreign countries with their parents seem to learn two languages almost as easily as one.In school it is not so easy to learn a second language because the pupils have so little time for it,and they are busy with other subjects too.A man's mind is rather like a camera,but it ta
• 设A为n阶可逆矩阵,α为n维列向量,记Q= ( A α)（上下两个括号和在一起的构成一个矩阵） (αT 1)证明 1 |Q|=|A-ααT| 2 |A-ααT|=|A|-αTA*αQ= A α αT 1
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