二叉树的第（）层上至多有2i-1（i≥1）个结点。
Your company uses Microsoft Windows Server Update Services （WSUS） to deploy software updates and service packs. Microsoft releases a security update for Windows 7. You have the following requirements： The security update must be deployed by 5：00 P.M. on Friday. Computers that are off when the security update is deployed must install the security update as soon as they are turned on. You need to manage the software update process to meet the requirements. What should you do？（） Approve the security update for installation through the WSUS console with a deadline of Friday at 5：00 P.M.。 Approve the security update for installation through the WSUS console with no deadline.。 Approve the security update for download through the WSUS console with a deadline of Friday at 5：00 P.M.。 Approve the security update for download through the WSUS console with no deadline.。
放炮工作必须由具有一定采掘经验并（）人员来担任。 具有班长身份的。 经过专门训练的。 负责安全检查的。 懂一些爆破理论的。
利用对象监视器可以设置窗体或组件的（） 方法。 属性。 外观。 执行代码。
从消费者行为的角度分析，其适应生活环境的独特行为方式是某种个性心理特征的反映，这种心理特征是（） 性格。 气质。 能力。 个性。
表格的边框大小由表格的（）属性指不定期，而单元格间距由表格的cellspacing属性指定。
