推 darkstar0412:答案多少???@@?? 220.131.18.231 07/09
→ darkstar0412:0嗎? 220.131.18.231 07/09
推 amymayyam:我也覺得式0140.127.179.227 07/09
推 darkstar0412:QQ 220.131.18.231 07/09
推 FNRLV:一定是0吧...x趨近無限大的速度比分子快多了... 140.135.24.71 07/09
推 jingwoei:為什麼? 59.121.159.22 07/09