Contact us
Choose a category below so we can get back to you as quickly as possible.
比如3.5:5化簡比就是35:50再7:10就ok了 求比值就是3.5除以5等於0.7比值就是0.7 我的數學可好了,相信我,保證對!
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.