A:
B:
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D:
There ____ a full bin yesterday. But there is an empty one now.
在下列各数:﹣3,+8,3.14,0,π,13,﹣0.4,2.75%,0.1010010001…中,有理数的个数是( )
圆E:(x+2)2+y2=4,点,动圆P过点F(2,0),且与圆E内切于点M,则动圆P的圆心P的轨迹方程是____