用焦距为15cm的凸透镜做成像实验,用光屏不能承接到像的是把蜡烛放在透镜前:[ 发布时间:2017-05-23 19:10 │ 来源:www.tikuol.com 题型:选择题 问题: 用焦距为15cm的凸透镜做成像实验,用光屏不能承接到像的是把蜡烛放在透镜前:[ ]A.12cm处 B.17cm处 C.30cm处 D.32cm处
题型:选择题 May I have a glass of beer,please?()一Beer?Sorry,there’s____left,butwould you like some juice instead?A.noneB.somethingC.no oneD.nothing 查看答案