(1)化简:45+1220-515(2)先化简,再求值:aa+3-3a-9a2- 发布时间:2017-05-24 15:52 │ 来源:www.tikuol.com 题型:解答题 问题: (1)化简:45+1220-515(2)先化简,再求值:aa+3-3a-9a2-9,其中a=1.
题型:解答题 In our factory there are 2,000 workers, and two thirds of _______ are women. A.themB.whichC.whomD.who 查看答案