科技创新之源是（） ["基础研究","物理研究","基因研究","纳米科技"]
感觉记忆
You are assigned the task of building a panel containing a TextArea at the top， a label directly below it，and a button directly below the label. If the three components are added directly to the panel. Which layout manager can the panel use to ensure that the TextArea absorbs all of the free vertical space when the panel is resized？（） [" GridLayout."," CardLayout."," FlowLayout."," BorderLayout."," GridBagLayout."]
在标准状态下，氧气的密度（）空气的密度 ["略小于","略大于","等于","小于"]
施工项目经理必须由具有与施工工程相适应的国家级（）资质的人员来担任。 ["会计师","经济师","建造师","工程师"]
非歧视原则
