撒哈拉以南非洲东临____洋,西临____洋,本区绝大部分地处____带,地形以____为主。
已知双曲线x2a2﹣y2b2=1的一个焦点与抛物线y2=﹣4x的焦点重合,且双曲线的离心率为5,则此双曲线的方程为( )
You are ___________ to type quickly when talking to each other on QQ so the other person doesn't get bored.