Contact us
Choose a category below so we can get back to you as quickly as possible.
1:頂角為180/(4+1+1)*4=120 2:工作效率比就是:(1/10)/(1/15)=3/2 工作時間是工作效率的反比,為2/3
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.