Which of the following commands will list all the logical volumes and the file system distribution across a specific physical volume（） ["Ispv-I","Islv-p","Ispv-L","Isvg"]
市场研究中可以从公开的海关统计库可以得到大量进出口信息，可以从海关统计中得到的信息有（）。 ["各种化学品的贸易进口信息","进出口贸易趋势和曲线","进口贸易商及进口地点","分年分月进出口总量和价值"]
Given: What is the result?（） ["0","1","2","3","4","Compilation fails.","An exception is thrown at runtime."]
Which of the following commands should be used to show how much data is read from or written to a particular logical volume， given there are several other logical volumes on the same disk？（） [" sar"," lslv"," iostat"," filemo"]
工作风缸充气止回阀在制动减压时，能防止工作风缸内的压力空气向（）逆流，以避免产生不制动或制动力不成比例的现象。 ["列车管","制动管","总风管","撒砂管"]
基团转位
