题目点 P(a,b,c)关于 x 轴的对称点是 ()A. (a,-b,-c)B. (-a,-b,c)C. (-a,-b,-c)D. (a,-b,c)点 P(a,b,c)关于 x 轴的对称点是 ()A. (a,-b,-c)B. (-a,-b,c)C. (-a,-b,-c)D. (a,-b,c)题目解答答案A. (a,-b,-c)