撒的读音和组词语

与半径为1的两个外切圆都相切,且半径为3的圆共能画出几个 在抛物面z=2^x2+y^2上求一点,使其到平面2x+3y-z+1=0的距离最近 求点p（2、1、1）到平面π：x+y+z+1=0的距离 太行山南北各是哪个省 CATIA 怎么才能Part与Part相关联CATIA 在一个Product怎么才能Part与Part相关联?例如;建立一个Product,画一个简单的方管,（作为一个part）；然后,两头画薄板紧贴在方管两端（此为一个part）.接着,方管 “隧道长为折合双洞长”是什么意思? 理想是石,敲出星星之火；理想是火,点燃熄灭的灯；理想是灯,照亮夜行的路；理想是路,引你走向黎明.用青春来造句 急 跪求英语大神~!翻译并检查下语法 感谢!All of the attribute of negative emotion , diffusion seem to be most influential. Without moderately control,the negative emotion will be general powerful when it comes up next time.Such hoisting of 驰骋沙场的女英雄,介绍(是驰骋沙场的) “万里赴戎机,关山度若飞”一句用夸张的修辞手法概括的写出了木兰驰骋沙场的矫健身姿.请展开联想,用简短的文字具体描写花木兰驰骋沙场的动作神态表情等. 求高手说明下此移动电源IC的各针脚意思, 初一英语作文 150字尽快 若1/X-1/Y=3 则分式2X+3XY-2Y/X-2XY-Y的值 怎样用万用表测电池两端电阻?红笔接电池正极,黑笔接电池负极吗?可不可以 红笔接电池负极,黑笔接电池正极呢?那如果颠倒了电阻示数会变大还是变小？ 凸透镜成像都是什么样的啊,比如在焦点或大于焦点之类的 （最好附图） 移动电源软件板和移动电源硬件板的区别在哪 若点P到圆O上的最小的距离是4,最大的距离是9,则圆的半径是什么?为什么直径是9-4=5得到?所以有很多地方不懂, 光学凸透镜成像规律以及像距焦点物距的关系 16．一物体经凸透镜成像在焦点附近,则——————————————（ ）（A）所成的像一定是实像（B）像与物大小一定不同（C）物体一定在离透镜很远处（D）若把物体移到像的位置,则 一点和圆o上最近点的距离为4,最远点距离为9,求这个圆的半径, 这篇文章的语法如何修改?（旁白）Friend ship is Warming glorious and fascinating.（Lisa and Nava 见面）Lisa:What best day What eat for lunch?Nava:How about noodles?Lisa：That sounds good!How about go to upstair?Lisa:Let’s go!（ 这篇文章语法有错误吗?dear panpan,my family and i are going to travel allover france.so,maybe i need your help.could you take care of my pet dog?of course you will say you can.you can call the pet pig Duoduo.could you please do these things 英语翻译As we all know,the environment around us is getting worse and worse.In some places we can't see fish swimming in the river or trees on the hills.Because there is less and less fresh water in the world.Some people even have no clean water 帮我纠正下错误的语法,,What did I learn about my oral English skill?I will say that I did learn a lot by these activities.First,it is very interesting to attend the English Garden from which I can learn some foreign customs.I can understand 帮我纠正下错误的语法,As a matter of fact,I consider myself have made a great progress in oral English by these activities.But there are still some aspects I need to improve on.First of all,I need to be more confident.I am too shy to speak E 理想是石,敲击星星之火；理想是火,点燃熄灭的灯；理想是灯照亮夜行的路理想是路引你走到黎明.仿写!用时间仿写 已知圆外一点的圆周的最短距离为2,最长距离为8,则该圆的半径是 已知圆O和一点P,点P到圆上一点的最短距离是2,最大距离是8,求圆O的半径 如图,已知圆A的半径为2,圆外一定点N与圆A上的点的最短距离为6,过动点p做圆A的切线PM（M为切点）,连接P=根号2PN,求p的轨迹连接PN使得PM=根号2PN，求p 的轨迹 北极地区可见极昼现象,太阳在地平线以上终日不落,则太阳在天空中做______运动 太阳有自己运行的轨道吗?如果有,它是什么样的轨道?是什么力量让太阳按一定轨道运行?月球绕着地球转,地球相对月球来说就是一颗恒星.而地球绕太阳转,太阳应该也有自己的运行轨道,可以 第二型曲线曲面积分中,边界方程能直接代入被积函数么?