【正确答案】 1、some novel features    

【答案解析】本题为细节题，由第一段第二句可知“Most of the good points of the earlier types have been incorporated into this machine which possesses，besides，several novel features which have been perfected by years of scientific research．”(这种吸尘器在融入了原有型号吸尘器的大多数优点的基础上，还具有一些经过了多年科研验证的新的特性)。