ɫ

ں500ʱƵγ̡13⡢10000ģ⡢3000㡢281˾桢˾ϡȫ24 СʱĿκ󸨵Чؽϰеȫְıر̸
10%۸ + 50%ѧϰʱ = 200%ѧϰЧ