EF vuông góc với AO.
A.Ax //EF, OA⊥Bx
B.Ax //EF, BA⊥Ax
C.Ax //EC, OA⊥Ax
D.Ax //EF, OA⊥Ax
A.Ax //EF, OA⊥Bx
B.Ax //EF, BA⊥Ax
C.Ax //EC, OA⊥Ax
D.Ax //EF, OA⊥Ax
Loga
Hóa Học lớp 12
