Contact us
Choose a category below so we can get back to you as quickly as possible.
x方=x,x=1,所以集合B={1}.(零沒有平方).希望可以幫到你,滿意請點小紅花採納
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.