1 |
1×3 |
1 |
2 |
1 |
3 |
1 |
3×5 |
1 |
2 |
1 |
3 |
1 |
5 |
1 |
5×7 |
1 |
2 |
1 |
5 |
1 |
7 |
1 |
1×3 |
1 |
3×5 |
1 |
5×7 |
1 |
2 |
1 |
3 |
1 |
2 |
1 |
3 |
1 |
5 |
1 |
2 |
1 |
5 |
1 |
7 |
1 |
2 |
1 |
3 |
1 |
3 |
1 |
5 |
1 |
5 |
1 |
7 |
1 |
2 |
1 |
7 |
3 |
7 |
1 |
x(x+3) |
1 |
(x+3)(x+6) |
1 |
(x+6)(x+9) |
1 |
a(a+1) |
1 |
(a+1)(a+2) |
1 |
(a+2)(a+3) |
1 |
(a+2006)(a+2007) |
1 |
3 |
1 |
x |
1 |
x+3 |
1 |
2 |
1 |
x+3 |
1 |
x+6 |
1 |
3 |
1 |
x+6 |
1 |
x+9 |
1 |
x |
1 |
x+3 |
1 |
x+3 |
1 |
x+6 |
1 |
x+6 |
1 |
x+9 |
1 |
3 |
x+9-x |
x(x+9) |
3 |
x(x+9) |
1 |
a |
1 |
a+1 |
1 |
2 |
1 |
a+1 |
1 |
a+2 |
1 |
a+2 |
1 |
a+3 |
1 |
a+2006 |
1 |
a+2007 |
1 |
a |
1 |
a+1 |
1 |
a+1 |
1 |
a+2 |
1 |
a+2 |
1 |
a+3 |
1 |
a+2006 |
1 |
a+2007 |
a+2007-a |
a(a+2007) |
2007 |
a(a+2007) |
x+1 |
y+1 |
y |
x |
A.0 | B.正数 |
C.负数 | D.以上情况都有可能 |
x |
y |
y |
x |
x2+y2 |
xy |
1 |
a |
1 |
b |
1 |
2 |
ab |
a-b |
1 |
R |
R1+R2 |
R1R2 |
1 |
a |
1 |
b |
1 |
a+b |
b |
a |
a |
b |
A.-3 | B.-2 | C.-1 | D.0 |
© 2017-2019 超级试练试题库,All Rights Reserved.