【单选题】Uncle Wang bought two ________ yesterday.
【单选题】Uncle Wang bought two ___________yesterday.
【单选题】Uncle Wang bought two yesterday.
【单选题】Uncle Wang bought two ___ yesterday.
【单选题】在软件生命周期中,能准确地确定软件系统必须做什么和必须具备哪些功能的阶段是(11)。
【判断题】一组向量如果含有零向量,则这组向量必线性无关。
【单选题】Uncle Wang bought two for me yesterday.