题目

某气态烃0.5 mol能与1 mol HCl完全加成，加成后产物分子中的氢原子又可被3 mol Cl2完全取代，则此气态烃可能是( ) 答案：．C [烃与HCl加成时，物质的量之比为1∶2，则该烃分子中含有两个碳碳双键或一个碳碳三键，加成产物与Cl2取代消耗3 mol Cl2，则该产物中含有3 mol氢原子，故1 mol该有机物中含有6 mol氢原子，符合条件的只有C项。]The Spring Festival is the    36   New. Year's Day. It usually comes    37  February. Everyone in China   38  the Spring Festival very much.    39   the Spring Festival comes, Wei Fang usually   40  her parents    41  their house,    42 do some shopping and   43  housework..    ___44 that day everyone in China   45  Jiaozi , New Year's cake and   46  other delicious food. Wei Fang likes New Year's cake, but  47   parents say Jiaozi is    48   than New Year's cake. Many  49  usually wear new clothes on Spring Festival. The Chinese people eat the New Year's cakes and Jiaozi   50  their house. How happy they are!【小题1】 A. China       B. Chinese           C. English  【小题2】 A. in             B.on                       C. at          【小题3】 A. like             B. is like             C. likes     【小题4】 A. After       B. How               C. When【小题5】 A. help            B. is helping        C. helps    【小题6】 A. clean        B. cleans          C. cleaning 【小题7】 A. but           B. /              C. so         【小题8】 A. some       B. other           C. others  【小题9】 A. In            B. On                   C. At       【小题10】A. eats         B. is eating           C. eating 【小题11】 A. any             B. much               C. some          【小题12】 A. hers              B. she                  C. her【小题13】 A. nice              B. more nice         C. nicer           【小题14】A. child          B. children           C. boys           【小题15】 A. in         B. over                 C. on