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- 1已知x,y是实数,根号3x+4然后+y平方－6y+9=0,若axy－3x=y,则实数a的值为
- 2求函数f(x)=1-x2/1+x2的值域
- 3一堆煤重45吨,一辆卡车要10小时才能运完.照这样的速度,完成任务的3/5需要多少小时?
- 4已知函数f(x)=cos²﹙x＋π/12﹚,g﹙x﹚=1+1/2sin2x 求：
- 5计算：(-x)²x³·（-2y）³-（-2xy）²·（-3x）³y.
- 6我应该预习初二的还是把初一的巩固
- 71+ how long it is _________we visited your mother?A since B that C before D affter 2+ ________ you
- 8形容关怀、照顾得非常细致周到.
- 9有关于知音的名言警句或古诗
- 10_______ he was old,___________he still worked very hard though和although选哪个?