题目

下列有关微粒性质的排列顺序正确的是 A．离子半径：O2->Na+>S2- B．第一电离能：O>N>C C．电负性：F>P>O D．基态原子中未成对电子数：Mn>Si>Cl 答案：DDebbie, who lives in Hong Kong, was on holiday in Beijing with her best friend Lily. Lily is a beautiful girl who is studying science at university. She also models【1】her spare time. Debbie is studying history and wants to be writer. Lily and Debbie were very 【2】 (excite)to be in Beijing because there was so much to see. Lily suggested 【3】(visit)the Great Wall first, so they went on a tour to see it the first day. Their tour guide was a young man with 【4】(glass)who was very 【5】 (knowledge). He told them many interesting stories. The next day, they took a bus from their hotel and then, using a map, they walked around some old hutongs. Both of the girls thought that it gave them a good idea of 【6】 life was like in the 13th century. Debbie was 【7】(especial) excited as she【8】(study)hutongs earlier in the year. 【9】was the Forbidden City that was next on 【10】(they) agenda and the girls loved every minute of the tour around the beautiful grounds. Because they were leaving the next day, when they finished the tour, they went shopping and splashed out on an expensive meal.