Which of the following statement is incorrect regarding RMAN？（） ["It detects corrupt blocks.","It performs only offline database backups.","It omits empty blocks during backups.","It performs tablespace point-in-time recovery （TSPITR）."]
起动机的定子俗称磁极，作用是（）。
瓦其保护的信号动作时，（）人员应立即处理，（）音响信号，对变压器进行（）检查。
为了防止危险的接触电压，把所有容易同时接近的裸露导体互相连接起来，这属于采用（）保护措施。 ["等电位环境","接零保护","不导电环境","接地保护"]
You use Group Policy to standardize Internet Explorer settings on Windows 7 client computers. Users occasionally change the Internet Explorer settings on individual client computers. The company wants to maintain a standard Internet Explorer configuration on all client computers. You need to ensure that the standard Internet Explorer configuration is in place each time users log on to client computers. What should you do？（） ["Enable User Group Policy loopback processing mode.","Use the Group Policy Update utility to refresh Group Policy.","Enable Internet Explorer Maintenance Policy Processing in Group Policy.","Use Group Policy to disable the Advanced tab of the Internet Explorer Properties dialog box."]
当前教师队伍中存在着“以教谋私”和"有偿家教"的现象，这实际上违背了（）。
