某元素的原子核可以俘获自身核外的一个K电子而转变成新元素，这种现象称为K俘获，在K俘获的过程中，原子核将会以光子的形式放出K电子的结合能．关于K俘获的过程，下列说法中正确的是（）

  Rick and Mary are from America．Now they are working in Tianjin．They can speak a little Chinese．Every morning they get up very early．Then they go to work by car.·They are very busy．They have lunch at the factory．①After lunch they work again．They finish their work very late．  In the evening they take Chinese lessons(上汉语课)．They want to talk with Chinese people．They often say，“Chinese people are very friendly(友好的)．”②They like to stay in China and they like to work with Chinese people．

根据短文内容，完成下列题目。