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。
During reboot the system hangs with an LED 0554 message that means， "The boot device could not be opened or a read failed." What recovery procedures should be taken？（） Boot in maintenance and use fsck to check hd5.。 Boot in maintenance mode， access the rootvg and check the /etc/inittab for corruption.。 Boot in maintenance mode， access the rootvg and rebuild the boot image using the bosboot command.。 Boot in maintenance mode， access the rootvg and use the bootlist command to create a valid boot list.。
During reboot the system hangs with LED 0581 that indicates "Configuring TCP/IP." Which recovery procedures should be taken？（） Boot in maintenance mode， and verify the Ethernet adapter configuration.。 Boot in maintenance mode， access the rootvg and check the /etc/inittab for corruption.。 Boot in maintenance mode， access the rootvg and rebuild the boot image using the bosboot command.。 Boot in maintenance mode after verifying the network connection， access the rootvg and check the /etc/rc.net file.。
测定受检血浆中有否肝素或类肝素物质存在，常用的试验是（） 蕲蛇酶时间测定。 蝰蛇毒试验。 甲苯胺蓝纠正试验。 凝血酶原纠正试验。
Which of the following commands displays the number of system calls per second that are being executed？（）
