未知题型 Roger: Hurry up! We don't have much time left. Dick: ______. We still have two hours. Roger: Come on! This is my first time ever to take a planE.I don't want anything to go wrong.A.Go onB.Take it easyC.All rightD.Look out
多项选择题 弗雷德曼方程表明宇宙的膨胀主要由下列哪几项所驱动 A. 宇宙学常数项 B. 涨落项 C. 曲率项 D. 实物组分项 E. 辐射组分项
未知题型 被采用最多的数据库备份策略有()