A.∀x∈R,有(x-
| B.∀x∈Q,有x2>0 | ||
C.∃x∈Z,使3x=128 | D.∃x∈R,使3x2-4=6x |
2 |
128 |
3 |
1 |
2 |
1 |
2 |
3 |
4 |
1 |
3 |
3 |
4 |
| ||
2 |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
c |
a |
b |
c |
a |
b |
c |
p |
p |
a |
b |
c |
A.0 | B.1 | C.2 | D.3 |
1 |
x |
A.4个 | B.2个 | C.1个 | D.0个 |
a |
b |
a |
b |
a |
b |
OP |
OA |
OB |
OC |
A.② | B.①② | C.②③ | D.①②③ |
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