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- 2因式分解:x(x-2)+x-2=0 ; x的平方-根号2x-四分之一=0;
- 3I was ten years old last year.(改为一般疑问句)
- 4两平行线分别过点A(3,0),B(0,4),它们之间的距离d满足的条件是
- 5函数y=(x2-1)/x的导数是
- 6已知m,n都是实数,且N=根号下m-4+根号下4-m再+8,求n的M次方
- 7找规律填数 2 6 15 { } 56 { } 141
- 8数字推理 6,10,-18,22,() A.0 B.20 C.-24 D.-20
- 9一个长方体的棱长总和是48厘米,并且它的长是宽的2倍,高与宽相等,那么这个长方体的体积是多少立方厘米?
- 10old man had nothing in his hand.(同义句)the old man —— —— in his hand