挑战习题
1/5单选题
难度:

1.化简分式的结果是( )
A 2
B
C
D
提示1:
IOWFiOWBmuaLrOWPt+WGheeahOWKoOazlQ==
提示2:
IOWBmumZpOazleaXtuimgeazqOaEj+WFiOaKiumZpOazlei/kOeul+i9rOWMluS4uuS5mOazlei/kOeulw==
提示3:
IOWBmuS5mOazlei/kOeul+aXtuimgeazqOaEj+WFiOaKiuWIhuWtkOOAgeWIhuavjeiDveWboOW8j+WIhuino+eahOWFiOWIhuino++8jOeEtuWQjue6puWIhg==
正确答案:QQ==
PGRpdj7op6PvvJo8aW1nIHdpZHRoPTQ4MSBoZWlnaHQ9NDIgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8yMy81NC9yQkFDRTFNTVY1YVMzX0dGQUFBR3N4aGVkSnMxMzAucG5nIj48YnI+5pWF6YCJ77yaQS4gPC9kaXY+