A: What can you see? B: I can see two____.A: What colour are they? B: They're____.
如图,CA⊥AB,DB⊥AB,已知AC=2,AB=6,点P射线BD上一动点,以CP为直径作⊙O,点P运动时,若⊙O与线段AB有公共点,则BP最大值为 ____.
如图是我市某一天内的气温变化图,根据图形,下列说法中错误的是( )