题目

相对剩余价值的获得是( )①个别企业提高劳动生产率的结果 ②科技进步而使必要劳动时间缩短的结果 ③整个社会劳动生产率提高的结果 ④延长工作日长度的结果 A . ①② B . ①④ C . ②③ D . ③④ 答案：CWe'll never forget ________ the other day. [　　] A．that we have been warnedB．what we were warned C．what we were warned ofD．what we had been warned of