心源性哮喘首选（）。
A client will be creating partitions on multiple systems with identical configurations. What is the recommended method for cloning the master partition?（） Create a mksysb backup of the original and restore it to the new partitions。 Use NIM to load the additional partitions from an image of the original partition。 Create alt_disk_install clones of the original partition and assign the target disks to the new partitions。 Use the split mirror function to split off additional copies of the original partition and assign them to the other partitio。
Which of the following commands should be used to observe the number of system calls per second? （） sar 。 iostat 。 svmon 。 vmstat。
Which iostat %iowait minimum threshold indicates a possible I/O bottleneck?（） 20% 。 40% 。 60% 。 80%。
可燃气体的危险性主要是其具有（）。 吸入性。 燃烧性。 爆炸性。 自燃性。 排放性。
Which command records the path taken by network packets between a source and destination system? （）
