My name is Tom. My best friends are John and Ann. John lives near my house and we are in the same class. He’s tall and thin, he has blonde hair and blue eyes. He is polite and very clever. He is very good at math and sometimes helps me with my homework sometimes. He usually wears jeans and a blue T--shirt. We three often play basketball in a nearby park.
   My friend Ann studies at another school.She’s short and slim(苗条的) with straight brown hair and brown eyes. She’s a little bit shy. We all have Kong fu lessons every Tuesday and Friday afternoon. We love Kung fu very much. Ann is really good at Kung fu. We call her the “Kong fu girl”. Sometimes she practices Kung fu with us. She loves wearing a T—shirts and a hat. The three of us have great fun together.

已知⊙O的半径为5，点P到圆心O的距离为7，那么点P与⊙O的位置关系是（  ）

设D是正$△P_1{P}_2{P}_3$及其内部的点构成的集合，点P₀是$△P_1{P}_2{P}_3$的中心，若集合$S=\left\{P|P\in D,\left|P{P}_0\right|\le \left|P{P}_i\right|,i=1,2,3\right\}$.则集合S表示的平面区域是（     ）

据图示信息，分析“蓉欧快铁”运行沿线可能发生的主要自然灾害。