我8万元买一个投影仪电视,专门放小猪佩琦英文版,每节课30元一人。8万元/30元/人=2666人·小时!多长时间能挣回来,在于人数和小时的多少变值。
2018-10-08
2018-10-08 test
练习材料: [Day 1473 2018-10-08] Lesson 1 A private conversati...
练习材料: [Day 1 2018-10-08] Lesson 1 A private conversat...
练习材料: [Day 1473 2018-10-08] Lesson 1 A private conve...
[Day 1 2018-10-08] Lesson 1 A private conversation Last w...
title: imperviousdate: 2018-10-08 16:11:37NO_sents: 26NO_...
title: fortuitousdate: 2018-10-08 16:49:30NO_sents: 103NO...
[Day 1 2018-10-08] Lesson 1A private conversation Last we...
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