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- 1(改为间接引语）1."where are you going?"asked her father 2."Come in ,"Mrs Smith answered.
- 2弹簧秤下挂一物体,在空气中弹簧秤的示数是400N,材料密度是多少?若将弹簧测力计上提,
- 31.(2x/x平方-1)-(1/x-1) 2.（xy-x的平方）除以(x的平方-2xy+y的平方/xy)×（x-y / x的平方） 括号中分式
- 4The program is ______ to help people who have been out of work for a long time.
- 53×﹙﹣2分之1﹚的立方－﹙﹣2﹚÷﹙﹣2﹚的平方＋﹙﹣2分之1﹚×﹙﹣3﹚÷﹙﹣2分之1﹚
- 6英译汉 I couldn't agree more.
- 7读古诗词猜成语
- 8先化简(-x平方+5+4x)+(5x-4+2x平方) 其中x=-2
- 9铭牌上标有“6V 10Ω”的电铃，要串联一个_欧姆的电阻，才能使它在9伏特的电压下正常工作．
- 10已知函数f(x)=2X平方-4图像上一点(1,-2)及邻近一点(1+△x,2+△y)则,△y/△x=?