从地理学角度来看,下图景观观赏时间性较强的为 ( )
A:AB
B:BC
C:AC
D:BD
— What does your father think of your school report this term?
—The smile on his face shows that he is_______ with what I've done.
α,β为平面,m为直线,如果α∥β,那么“m∥α”是“m⊆β”的( )
——Where do you often exercise?——I often exercise in a park. It's close to my house.