The Rules state that vessels may depart from the Rules when（）. ["there are other vessels in the vicinity","operating in a traffic separation scheme","engaged in a situation involving more than two vessels","necessary to avoid immediate danger"]
在Windows 2000中启动某应用程序，可以单击“开始”菜单中的“运行”项，系统会弹出一对话框，在对话框的“打开”下拉列表中列出了（）。 ["最近几次保存过的程序文件名","磁盘上所有可执行文件的文件名","最近几次使用过“运行”项启动的程序文件名","已启动的程序文件名"]
粗大误差产生的原因是什么？
Which statement about the Navigation Rules is TRUE?（）. ["The rules require vessels to comply with Traffic Separation Scheme regulations","The rules use the term safe speed","The Rules permit a stand-on vessel to take action prior to being in extremis","All of the above are correct"]
专业版的移动证书密码输入错误次数是如何规定的？
什么是随机误差？系统误差？粗大误差？
