x No Plagiarism!6m7aaU1q3ikXvN31AgbQposted on PENANA 地球的重力加速度是9.8,心裡的重力加速度,無盡。8964 copyright protection19PENANApfUk8TtN8k 維尼 172.71.254.170ns 172.71.254.170da2