挑战习题
1/5单选题
难度:

1.的相反数是()
A
B
C
D
提示1:
PGI+5Y+q5pyJ56ym5Y+35LiN5ZCM55qE5pWw5piv55u45Y+N5pWwPC9iPg==
正确答案:Qw==
PGI+5Y+q5pyJ56ym5Y+35LiN5ZCM55qE5pWw5piv55u45Y+N5pWw77yM6YCJRDwvYj4=