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- 1甲乙做一项工作,甲先做5天乙接着做20天可以完成.如果甲做20天乙接着做8天可以完成如果两人合作需多少天完成?
- 2X+XX+XXX+XXXX+XXXXX+...怎么可以简化算
- 3六(1)班有男生25人,比女生多5人,多百分之几?
- 4Let's have dinner together.(用would like to改写句子) ____ ____ ____ ____ have dinner ____ _____?
- 5I finished ____(read) the book last night.
- 6在三角形ABc中/D为AC上一点/且cD二AB/M.N分别为BC,AD的中点/MN的延长线交BA的延长线于点E/求证AE=AN
- 7I really don't know what I should write to him.I really don't know ___ ___ ___ to him
- 87分之4除以13表示什么?
- 9若函数f(x)=ax^2-lnx在(0,1]上存在唯一零点,则实数a的取值范围shi
- 10定义在R上的函数f(x)满足f(x)=3^(x-1) ,x0,则f(2010)=___