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最新问答: 求下列各数的立方根:0.81 16(-3)的平方-4的绝对值正数a-(2的平方)4 如图所示,一细束白光通过三棱镜折射后分为各种单色光,取其中a、b、c三种色光,并同时做如下实验:①让这三种单色光分别通过 阅读下面材料,按要求作文。一只蚂蚁来到石头下,它急急忙忙的往上攀爬,这块石头对它来说实在太陡峭了, 基圆直径公式?请问基圆直径公式是齿顶圆直径*COS20°还是齿根圆直径*COS°题目:已知一对外啮合正常齿制标准支持圆柱 dilatation是什么意思 He asked us to sing an English song. 良好的健康状况依赖于良好的食物 翻译成英文 为什么欧姆表的内阻等于刻度盘中间处的刻度值? 帮翻译一段话look on the left of your postthere are three things R final winnter中文意思 一列快车和一列慢车,分别从甲、乙两地同时相对开出,快车每小时行75千米,慢车每小时行65千米,两车在距中点20千米处相遇 将氯气通入含有12.5 G NaBr 的溶液中,反应后将溶液加热蒸干 得到 8.05 G 固体,求反应中消耗的氯气的质量 2.7g某铵态氮肥(不含硝酸根)与过量氢氧化钙混合后加热,将放出的氨气通入25ml2mol/l硫酸溶液中,氨被充分 We like _ride bicycles_in the park.(划线提问)What____ ____ ____ 2的x次幂等于x的平方的解 曹操煮酒论英雄 “勉从虎穴暂趋身,说破英雄惊杀人.巧借闻雷来掩饰,随机应变信如神”文末诗句的作用是什 甲乙两列火车,上午80分别从ab两站相向均匀开出,到上午十时两列车相距10万米到11时两列车又相 1已知函数.f(x)=3ax^4-2(3a+1)x^2+4x 设A是m*n矩阵,B是n*m矩阵,证明:若r(A)=n,则r(AB)=r(B). 解方程:3x²+1=2√3x