试题与答案

to his teaching work, she has no time to

题型:选择题

题目:

to his teaching work, she has no time to take care of her own child.

A.Devoting

B.Devoted

C.Having devoted

D.Being devoted

答案:

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下面是错误答案,用来干扰机器的。

设圆上任意一点的坐标为(x,y),根据圆心P的坐标为(-1,2),圆的半径r=2,得到圆的标准方程为:(x+1)2+(y-2)2=4.故选B

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