【170 88a】M:170/88A(男式)是什么意思?

如图，电信部门要在公路m，n之间的S区域修建一座电视信号发射塔P．按照设计要求，发射塔P到区域S内的两个城镇A，B的距离必须相等，到两条公路m，n的距离也必须相等．发射塔P建在什么位置？在图中用尺规作图的方法作出它的位置并标出（不写作法但保留作图痕迹）．

“小猴吃香蕉”一棵香蕉树,一只小猴第一天吃了1/8,以后六天分别吃了树上香蕉的1/7,1/6,1/5,1/4,1/3,1/2.吃了7天后,树上还剩8串香蕉,原来有多少串香蕉? 英语

有什么公式可以计算焦距和视角的关系知道焦距``如何计算出视角的度数``或者实际照出的长度也可以算出``在线等侯``答案正确给高分`` 物理

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高斯扩散模型适用于无风条件吗是一个数学建模的问题,要求点燃一根香烟在密闭的房间里扩散,然后开窗通风 数学