Contact us
Choose a category below so we can get back to you as quickly as possible.
1.兩個數的積是正數,這兩個數都是正數(錯) 負數乘負數也等於正數 2.負數的任何次方都是負數(錯) 負數的奇數次方是負數,但偶數次方是正數
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.