A.①③ | B.①④ | C.②③ | D.③④ |
A+B |
2 |
A-B |
2 |
A+B |
2 |
π |
2 |
A+B |
2 |
A-B |
2 |
π |
2 |
A-B |
2 |
A+B |
2 |
A-B |
2 |
A+B |
2 |
A-B |
2 |
π |
2 |
A-B |
2 |
π |
2 |
A-B |
2 |
π |
2 |
A.命题“若p,则q”与命题“若¬q,则¬p”互为逆否命题 |
B.命题p:∀x∈[0,1],ex≥1,命题q:∃x∈R,x2+x+1<0,则p∨q为真 |
C.“若am2<bm2,则a<b”的逆命题为真命题 |
D.若p∨q为假命题,则p、q均为假命题 |
A.∀n∈R,n2≥n | B.∃n∈R,∀m∈R,m•n=m |
C.∀n∈R,∃m∈R,m2<n | D.∀n∈R,n2<n |
2 |
3 |
2 |
3 |
A.0 | B.1 | C.2 | D.3 |
1 |
2 |
1 |
2-π |
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