作为德国国家标准和欧洲标准，由3个系列组成的现场总线是（）。 ["FF","PROFIBUS","LonWorks","CAN"]
Refer to the exhibit. Which two statements about the SDF Locations window of the IPS Rule wizard are true？（） ["An HTTP SDF file location can be specified by clicking the Add button.","If all specified SDF locations fail to load， the signature file that is named default.sdf will be loaded.","The Autosave feature automatically saves the SDF alarms if the router crashes.","The Autosave feature is automatically enabled for the default built-in signature file.","The name of the built-in signature file is default.sdf.","The Use Built-In Signatures （as backup） check box is selected by default."]
满载与无载最大爬坡度
带状组织
分科课程
同生结核
