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BC |
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0 |
b |
0 |
a |
b |
a |
b |
a |
b |
a |
b |
OP |
OA |
OB |
OC |
A.1 | B.2 | C.3 | D.4 |
AB |
BC |
CD |
DA |
AC |
CD |
DA |
AD |
DA |
0 |
b |
0 |
a |
b |
a |
b |
a |
b |
a |
b |
a |
b |
OP |
OA |
OB |
OC |
OP |
OA |
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OC |
OP |
OC |
OA |
OC |
OB |
OC |
CP |
CA |
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CP |
CA |
CB |
A.∀x>0,有ln2x+lnx+1>0 |
B.∃α,β∈R,使cos(α+β)=cosα+cosβ |
C.“a2<b2”是“a<b”的必要不充分条件 |
D.∃m∈R,使f(x)=(m-1)xm2-4m+3是幂函数,且在(0,+∞)上递减 |
A.0 个 | B.1 个 | C.2 个 | D.3 个 |
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