a |
c |
b |
d |
1 |
a |
1 |
b |
A.1 | B.2 | C.3 | D.4 |
8 |
2 |
7 |
1 |
1 |
3 |
1 |
2 |
1 |
2 |
1 |
3 |
A.③④ | B.①④ | C.①③④ | D.②③ |
A.函数f(x)的图象恒过点(1,1) |
B.∃x0∈R,使得f(x0)≤0 |
C.函数f(x)在R上单调递增 |
D.函数f(x)在R上单调递减 |
A.∃x∈[0,
| B.∀x∈(3,+∞),x2>2x+1 | ||
C.∃x∈R,x2+x=-1 | D.∀x∈(
|
x |
x+2 |
a |
b |
a |
b |
a |
b |
a |
a |
b |
A.0个 | B.1个 | C.2个 | D.3个 |
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