When you connect an external monitor to your portable computer， the same image appears on both monitors. You need to drag a window from one monitor to the other. What should you do？（） ["Change the display setting to extend the desktop.","In the Microsoft Windows Mobility Center window， turn on the Presentation Settings feature. ","Configure the external monitor as the primary display and the built-in monitor as the secondary display.","Change the secondary display resolution settings to make them equal to or less than the primary display resolution settings."]
需在基坑顶边堆放弃土时，任何情况下，弃土堆坡脚至基坑上边缘的距离不得小于（）。 ["1.0m","《给排水管道施工与验收规范》GB50268-2008规定，放坡开槽时不小于0.8m。","1.5m","1.8m"]
当变压器空载运行时，空载电流可分为（）和（）两部分，由于铁损电流比重很小，因此常将空载电流称为励磁电流。
控制器是人一机系统的重要组成部分，下列（）属于旋转控制器。 ["脚踏板","手轮","开关杆","手闸"]
在Word 97删除选定表格的单元格时，可以使用（）菜单项中的“删除单元格”命令。
职能部门化是指按照（）的原则来划分新闻单位内部部门的方法。
