题干

点(-2,a)关于原点对称后的坐标为(b,3),则a+b的值为(     )

A:1

B:5

C:-1

D:-5

上一题 下一题 0.0难度 选择题 更新时间:2018-04-12 06:12:24

答案(点此获取答案解析)

C

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