A.∀x∈R,x2-1=0 | B.∃x∈Z,3x-1=0 |
C.∀x∈R,x2+1>0 | D.∃x∈Z,1<4x<3 |
1 |
3 |
1 |
4 |
3 |
4 |
1 |
2 |
A.若m,n,l所成的角相等,则m∥n |
B.若α∥β,m⊂α,则m∥β |
C.若m,n与α所成的角相等,则m∥n |
D.若γ与平面α,β所成的角相等,则α∥β |
A.若m∥α,α∩β=n,则m∥n | B.若m∥n,m⊥α,则n⊥α |
C.若m⊥α,m⊥β,则α∥β | D.若m⊥α,m⊂β,则α⊥β |
© 2017-2019 超级试练试题库,All Rights Reserved.