已知y轴上的点P到原点的距离为5,则点P的坐标为 ( )
A:(5,0)
B:(0,5)或(0,5)
C:(0,5)
D:(5,0)或(5,0)
I can't enter the room because the k____ to the door is lost.
The green sweater is only 50 ____ (dollar).
正确地盖盖玻片是成功制作临时装片的关键.图1所示制作临时装片时盖盖玻片的操作,正确的是( )