Contact us
Choose a category below so we can get back to you as quickly as possible.
設X分鐘後甲可以追上乙 120*1.5X-120*X=400-100 60X=300 X=5 5分鐘後甲可以追上乙
We and our partners use cookies and other technologies to analyze traffic and optimize your experience. View more info and control your cookies settings at any time in our Cookies Policy.