53.　　 乙醇与钠__________________________________________________________________

52.　　 2-溴丙烷与氢氧化钠醇溶液_________________________________________________

51.　　 溴乙烷与氢氧化钠溶液______________________________________________________

50.　　 苯与液溴__________________________________________________________________

49.　　 碳化钙与水________________________________________________________________

48.　　 丙烯制聚丙烯______________________________________________________________

47.　　 乙烯与水__________________________________________________________________

46.　　 乙烯与溴水________________________________________________________________

45.　　 烃(CxHy)燃烧通式________________________________________________________

44.　　 甲烷与氯气(只写第一步)__________________________________________________