AB |
BC |
CD |
DA |
0 |
AB |
CD |
AC |
BD |
AD |
BC |
AB |
AC |
AC |
AD |
AB |
AD |
OP |
OA |
OA |
OC |
A.1 | B.2 | C.3 | D.4 |
AB |
BC |
CD |
DA |
0 |
AB |
a |
AD |
b |
AC |
c |
AB |
CD |
AC |
BD |
AB |
AD |
AC |
a |
b |
c |
a |
b |
a |
c |
AC |
AD |
AB |
c |
b |
a |
c |
b |
a |
c |
c |
b |
a |
b |
c |
b |
a |
b |
b |
c |
a |
AD |
AC |
AB |
AD |
BC |
BC |
AC |
AB |
BD |
AD |
AB |
AB |
AC |
AC |
AD |
AB |
AD |
BC |
BD |
AC |
AB |
AD |
AB |
AB |
CD |
CB |
DB |
DC |
0P |
OA |
OB |
OC |
A.0 | B.3 | C.2 | D.1 |
A.若m∥n,m⊥α,n⊥β,则α⊥β | B.若m∥n,n⊥β,m⊂α,则α⊥β |
C.若m∥n,m⊂α,n⊂β,则α∥β | D.若m⊥α,m⊥n,n⊂β,则α∥β |
A.①和② | B.②和③ | C.③和④ | D.②和④ |
A.M是棱柱,S逐渐增大 | B.M是棱柱,S始终不变 |
C.M是棱台,S逐渐增大 | D.M是棱台,S积始终不变 |
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