Contact us
Choose a category below so we can get back to you as quickly as possible.
a、d相反數 a+b=0 c、d倒數 cd=1 原式=0/2010x+x+2010 =0+x+2010 當x=-2時原式=2008 當x=2時原式=2012
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.