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三相电机最基本接线问题我对电路一窍不通,看公司机床电路一点都看不懂,这个电路如果按下按钮,是不是等于把三项电其中两项接通了?不就短路了吗? 三相五线制怎么跟三相电机接线?零线 地线接哪儿了 在平面直角坐标系第一象限中：A在x轴中,B在A的右上方,O是原点,C在O和A之间上方,OABC是平行四边形平行四边形OABC的顶点B的坐标为（6,4）.若直线I经过（1,0）,且将平行四边形OABC分割成面积相等 我们要组织到公园参加游园晚会,()你不去,他（）不去.（填关联词） in与thought的区别；He made a large telesope,through which he could observe the stars.为什么不可以用in which啊. 杭州市.萧山区安装三相电的问题!现在家里到底能不能申请安装三相电的啊?没有原因我就是想装三相电!我都送了两中华了!都不知道为什么不给装!去问问老说现在装三相很麻烦的!政府到底有 the clever boy made a hole in the wall ,through which he could see what was happening inside the hoA in which B through which C at which D on which主句与从句是什么关系?为什么选B there was a hole in the wall .Through the hole he could see what was happening in the next room连成定语从句 The clever boy made a hole in the wall(through which)he could see(what)was going on inside the hous为什么不是用through that ,what, 氧化铜和碳酸钠反应吗,交换了成分生成碳酸铜沉淀,这样就能反应吗,详解,谢 提问一道奥数题一辆货车从甲城到乙城需8小时,一辆客车从乙城到甲城需6小时,货车开了2小时后客车出发,客车出发后,几小时两车相遇? The thief entered the room by the 把一根长15厘米的小棒截成3根整厘米的小段围成一个三角形最长的一段不能超过多少厘米 Can I silently behind you without being 英语谜题 Where can you lie without being scolded? 89. At that time I had no idea ________ I could hand it to him without being seen.A. if B. how C. which D. that how为什么选B? D有什么不对? where canyou lie without being scolded 剑桥雅思7test4阅读答案 大学理论力学的动量问题求解? 动量 动能 同一道题用动能守恒和动量守恒求出来的结果不一样,这是为什么? 大学理论力学题,请问答案中的F1到A的力臂为何去l（字母）,而不是别的?谢 the boy slipped out of the room and go swimming中的slip out of the room怎么翻译? Jim was seen () out of the room为什么不是go或going? 求翻译：This is how we become real to ourselves--by being seen by others. it is kept in the room by us 和 it was kept in the room by us 和it is being kept in the room by us具体意思有什么区别啊 这是不是个病句.英语.Whenever and wherever I will be your side forever. 请教初中数学问题,求高手解答12-16题,要有详细步骤哦~ 英语病句查询帮忙找找语病在哪 急 1.They have kept cats in many years.2.The room is very clean now.Who is clean it? 初中数学,第17题,求AF最小值,求过程 下列物质的酸碱性食盐,食盐溶液,碳酸钠,碳酸钠溶液,碳酸氢钠,碳酸氢钠溶液 When i saw you的歌词 物质的酸碱性,探讨1.人体的血液的PH为（）,人的汗液的PH为（）．PH大于（）的盐碱地,草木难生2.PH等于0溶液呈（）性,PH等于（）溶液呈中性．