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最新问答: People never know what happened? 遵守纪律 作文 ( )there a bag and a tablen in the picture后面添什么 2a(a2+3a+1) (-3/2x²-2x+)(-2x²) a(b-c)+(c-a)+c(a-b) 我喜欢你,你能和我在一起吗.英语怎么写.. 摒弃陋习,追逐梦想的作文400字 已知三个有理数a、b、c的积是正数,它们的和是正数,当x=|a|/a+|b|/b+|c|/c时,求代数式 She used to play the guitar on weekends完成反义疑问句 Mother was worried because little Alice was ill,especially _ 除法算式中的( )、分数中的()和比的()都不能为零 人类今后面临的最大生存危机可能是: [ ] A、土地减少的危机; 天空中有伙伴关系的生物 扩写句子:柳条拂动着水面(至少两处) 三角形的几个心向量形式的证明求证 :1. O是垂心,即三边高的交点:tanAOA+tanBOB+stanCOC=02.若 翻译:Our teachers have time and time again stressed the import 氧化铜和炭粉的混合物3.44g加热后恰好完全反应,将生成的气体通入过量的澄清石灰水中,可得到白色沉淀2.0g,试求原混合 钢样中硫含量测定.称取5.00g 钢样,经管式炉燃烧,生成的SO2被吸收后碘标准液滴定,消耗3.00ml. Her birthday is ( ) July 2nd.And my birthda 若sinx≥根号3/2,求x范围 寓意和比喻义的区别,回答得快又好的加分