节能发电调度本质上是电力系统机组组合和经济调度问题，从数学角度来说，机组组合是一个（ 发布时间：2018-05-22 07:42 │ 来源：www.tikuol.com 题型：多项选择题 问题： 节能发电调度本质上是电力系统机组组合和经济调度问题，从数学角度来说，机组组合是一个（）问题。A.大规模B.非线性C.时变的D.混合整数优化
题型：多项选择题 完形填空。 Diana Velez does everything with maximum effort-and at maximum speed. That 1 learning a newlanguage, completing two certificates and opening a store. When arriving in Canada in 2008, she had one 2 ; to have what she had back Home in Colombia. "I didn't want to 3 what I do, like so many who come to a new Country," she said. "I 4 to open astore here in Canada but knew I had to 5 myself properly." Diana quickly realize that making her dream of shop ownership in Canada a 6 meant going to schoolto get the 7 education and certification. "My experience of owning a shop and working as a designer inColombia gave me 8 in my abilities, but I couldn't speak the language and I had to 9 how to do thingsin Canada. It was like having to 10 all over again," said Diana. 11 , she found just the help she needed for relaunch (重新开张) 12 continuing education at George Brown College. She began taking 13 for both the Essential Skills in Fashion Certificate and the Image Consulting Certificate in May 2009. 14 Diana met with the language barrier, she was always going 15 while at college. By the end of October 2009, she had completed all certificate requirements. Within two years after her 16 in Canada, Diana at last achieved her 17 goal when her new store opened its doors in Toronto'sSheppard Center. She was on the fast-track to 18 . Looking back, Diana, a fashion (时装) designer, 19 her achievements to the goal she set, the educationshe received from the college, and 20 , the efforts she made. Now Diana is very happy doing what she is doing. ( )1. A. requires ( )2. A. goal ( )3. A. continue ( )4. A. demanded ( )5. A. teach ( )6. A. reality ( )7. A. physical ( )8. A. pressure ( )9. A. put away ( )10. A. advance ( )11. A. Naturally ( )12. A. through ( )13. A. notes ( )14. A. Though ( )15. A. around ( )16. A. adventure ( )17. A. original ( )18. A. success ( )19. A. adds ( )20. A. after all B. encourages B. memory B. choose B. decided B. prepare B. fact B. private B. judgment B. depend on B. start B. Gradually B. for B. responsibilities B. As B. back B. arrival B. common B. wealth B. connects B. above all C. includes C. choice C. change C. agreed C. enjoy C. challenge C. primary C. influence C. learn about C. suffer C. Luckily C. before C. chances C. Since C. ahead C. performance C. another C. glory C. devotes C. at least D. advises D. problem D. lose D. hesitated D. persuade D. wonder D. necessary D. confidence D. look into D. work D. Clearly D. with D. courses D. Once D. out D. journey D. distant D. happiness D. owes D. at first 查看答案