初中问题

1 This is my schoolbag.
2 Is this your schoolbag?
3 Yes!It's his schoolbag.
4 NO.It's his schoolbag.
5 That dictionary is not yours.
6 Is that pencil sharpener hers?
7 No,it isn't,it's my pencil sharpener .
8 How to say this in English?
9 It is an eraser./It is a rubber.
10 How do you spell it?
11 E-R-A-S-E-R./R-U-B-B-E-R.
12 My name is Gina Green.
13 Your name is Tom,you are a boy.
14 What color is this pen? It is black.
15 How is your dad?
16 He's fine,thanks.

1 由条件知a=-b,a=-(1/c),所以a*c=-1,(b/a)=-1,-1的2010次方为1
代入题目中
x²-2a+(ax/x)-b+ac+1
=4-2a+a-b+(-1)+1
=4-2a+a+a-1+1
=4

2 根据给出的条件知道算式左边各底数的和等于右边数字的底数，因此若1的3次方加上2的3次方加上3的3次方。。。加上2010的3次方等于a的2次方，那么a等于1加2加3……一直加到2010，题目变成简单的等差数列
即a=1+2+3+4+……+2010
=（1+2010）*2010/2
=30165

This is my schoolbag.
2 Is this your schoolbag?
3 Yes!It's his schoolbag.
4 NO.It's his schoolbag.
5 That dictionary is not yours.
6 Is that pencil sharpener hers?
7 No,it isn't,it's my pencil sharpener .
8 How to say this in English?
9 It is an eraser./It is a rubber.
10 How do you spell it?
11 E-R-A-S-E-R./R-U-B-B-E-R.
12 My name is Gina Green.
13 Your name is Tom,you are a boy.
14 What color is this pen? It is black.
15 How is your dad?
16 He's fine,thanks.

1 由条件知a=-b,a=-(1/c),所以a*c=-1,(b/a)=-1,-1的2010次方为1
代入题目中
x2-2a+(ax/x)-b+ac+1
=4-2a+a-b+(-1)+1
=4-2a+a+a-1+1
=4

2
即a=1+2+3+4+……+2010
=（1+2010）*2010/2
=30165