【单选题】建筑石膏在使用时,为满足施工操作的要求,往往需掺入适量的( )
【单选题】After ________in the research for so many years,the scientist succeeded in finding the result at last.
【单选题】I had the privilege of watching many patients restoring their sight after many years of blindness.
【判断题】有宗教信仰的游客在生活上一般有些特殊要求和禁忌,导游人员应按照旅游协议书中的规定,尽量予以满足。( )
【简答题】根据中断入口地址提供方式的不同,中断可分为向量中断和____中断。