题目

阅读理解 阅读短文并选择正确答案 Mrs Green lives in a small village . Her husband is dead ,but she has one son .His name is Jack . He is twenty-one .He worked in the shop in the village and lived with his mother , but then he found a job in a faraway ()town named Green Sea .He went and lived there .Mrs Green was not happy about it . Last Sunday ,Mrs Green was angry .She got on a train and went to her son’s house in Green Sea . Then she said to him,“Jack ,why do you never telephone me ?” Jack laughed , “But ,mother ,you don’t have a telephone .” “No,”she an（5分）①CH3—CH2—CH2—CH2—CH3 和② ③CH3—CH3和CH3—CH2—CH3 ④CH3—CH2—CH2—CH3和⑤O2和O3 ⑥12C和14C（1） 组互为同位素； （2） 组是同一物质；（3） 组两物质互称为同系物；（4） 组两物质互为同分异构体。