A.x<
| B.x≤
| C.x>
| D.x≥
|
1+a+1+b |
2 |
2+a+b |
2 |
a+b |
2 |
a+b |
2 |
A.3 | B.4 | C.
| D.
|
1 |
y |
1 |
z |
1 |
x |
A.至少有一个不大于2 | B.都小于2 |
C.至少有一个不小于2 | D.都大于2 |
2 |
a |
3 |
b |
A.24 | B.25 | C.26 | D.27 |
1 |
a |
1 |
b |
A.a2<b2 | B.ab<b2 | C.
| D.|a|+|b|>|a+b| |
2 |
x |
1 |
y |
A.m≥4或m≤-2 | B.m≥2或m≤-4 | C.-4<m<2 | D.-2<m<4 |
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