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复数a+bi的平方为5+12,则a=多少,b=多少.是5+12i 双曲线方程及性质的应用已知双曲线3x²—y²+3,过P（2,1）点做一直线交双曲线于A ,B两点,若P为AB的中点,(1)求直线AB的方程（2）求弦AB的长 1. The water level ( ) suddenlyA.rise B to rise 顺便说一下为啥哈 The water finds its own level gentleman中文是什么啊怎么读? 指出各句的结构. the water level rises tony cleaned the blackboardthe cloth feels soft.i refused to say sorry to her.my father showed me his new mobile phone. A Gentleman 绅士 阅读理解Dick was seven years old,and his sister,Catherine．was five．One day their mother took them to their aunt's house to play while she went to the big city to buy some new clothes．The children played for an hour,and th 叹息造句快回答 叹息怎么造句我现在就要,我现在三分钟之内, Good to share,Important 4 everyone!这英文怎翻译? 求arcsin(cos4π\7)的值 A cup of tea products ups and downs common heart made thousands of the world啥意思 according to a government notice.All dairy products made______Sept.14 must be pulled off the sh...according to a government notice.All dairy products made______Sept.14 must be pulled off the shelves.A.in B.before C.at D.later 理由是什么.. The company made efforts_____their products.A.promoting B.to promote C.promoted D.topromoting Promoting Potable Water Supply qmd.wangming1.cn and Sanitary Systems water supply connector是什么意思 GOOD CLEAN UP AND REQUALIFY you are my girl,I love you more than i can say.中文意思, 照照片小明一家六口人到郊外春游,由其中一人给其他人拍照.如果单人各照一张,每两个人合影一张,每三人合影一张,每四人合影一张,那么用36张的彩色胶卷,最后还剩下多少张? When would i met the girl who is that i could told some one my love for u more than anyone英文翻译 图片中的数学题☆棱长为1厘米的若干个小正方体摆放成如图所示的几何体,然后再露出的表面上涂上颜色,（不含底面）.求出涂上颜色部分的总面积. 照片数学题 数学题,求照片 图图的数学题怎么解?帮我... 用6m长的条形木料做成如图所示的窗框（包括中间的两根横档）...用6m长的条形木料做成如图所示的窗框（包括中间的两根横档）.问：窗框的高和宽分别是多少时,窗户的面积最大（此时采光 shadows of love 谁能给我 求双曲线的所有性质及特殊情况下简便的求法 The committee_____ among themselves for four hours.A.has been arguing B.have been arguing what does “their own language” mean?什么意思帮帮忙撒 What does "their own language" why does English language mean to you演讲稿 ,英语演讲稿! 怎么记1~12月的单词