大小单双的平台是合法的吗

简介：After the second period, there was originally a 40-minute exercise time. Because the loudspeaker and sound facilities in the playground were a bit old and needed to be replaced, there was no exercise for the first time. Principal Shan Weixiong stood in the office and looked at the laughing and playing classmates and took a sip of tea. Showing a faint smile.