若x1、x2是一元二次方程2x2-3x+1=0的两个根,则x12+x22的值是( 发布时间:2017-04-27 07:24 │ 来源:www.tikuol.com 题型:选择题 问题: 若x1、x2是一元二次方程2x2-3x+1=0的两个根,则x12+x22的值是( )A.54B.94C.114D.7
题型:选择题 All stations which receive a distress alert shall immediately cease().A.any transmissionB.any harmful transmissionC.to use radiotelephoneD.using radiotelephone 查看答案