你面向一高墙喊话,如果听到回声,那么你和高墙之间的距离至少为( ) A.大于34 发布时间:2017-05-03 07:44 │ 来源:www.tikuol.com 题型:选择题 问题: 你面向一高墙喊话,如果听到回声,那么你和高墙之间的距离至少为( )A.大于34米B.大于17米C.等于17米D.等于34米
题型:选择题 The two girls, born four days _______ in January 1986, have been friends since their junior days and both won the championship this year.A.offB.awayC.aheadD.apart 查看答案
题型:选择题 A.条件(1)充分,但条件(2)不充分. B.条件(2)充分,但条件(1)不充分. C.条件(1)和(2)单独都不充分,但条件(1)和条件(2)联合起来充分. D.条件(1)充分,条件(2)也充分. E.条件(1)和(2)单独都不充分,条件(1)和条件(2)联合起来也不充分.[*] (1) x=4y (2) x+y=1 查看答案