(2013•浙江)已知i是虚数单位,则(2+i)(3+i)=( ) A.5﹣5i 发布时间:2017-05-20 13:47 │ 来源:www.tikuol.com 题型:选择题 问题: (2013•浙江)已知i是虚数单位,则(2+i)(3+i)=( )A.5﹣5iB.7﹣5iC.5+5iD.7+5i
题型:选择题 Which of the following is least likely a condition that characterizes competitive price-searcher markets (monopolistic competition)()A. Low barriers to entry.B. Large number of independent sellers.C. Producers face horizontal demand curves. 查看答案