设集合S k ={x|x∈I∧x≥k},k≥0,证明:(S k ,+)是一个半群,其中,+是普通加法运算.
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【简答题】When feeling a snake crawling across her feet, the hostess managed to keep calm and make the snake crawl out of the hall, though her face __________ terror.
【简答题】Whenfeeling a snake crawling across her feet, the hostess managed to keep calm andmake the snake crawl out of the hall, though hece __________ terror.A. quivered with B. paled with C. endowed with ...