设F₁和F₂为双曲线$\frac{x^2}{4}-y^2=1$的两个焦点，点P在双曲线上且满足∠F₁PF₂=90°，则△F₁PF₂的面积是（　　）

拥有美好而充实的人生，是我们共同的心愿。

    My name is Cindy. I am a girl. I am ten years old. I am a pupil. I'm tall and fat. I have two good friends. Celia is tall and thin. She's shy. But sometimes she's very funny. Tina has short hair.

    She is helpful. Miss Liu is our Chinese teacher. She is clever and beautiful. She teaches well. We all like her Chinese class.