The bos.perf package is part of the base operating system. Performance Diagnostic tool， PDT， is a part of bos.perf. All of the following statements are true EXCEPT？（） PDT attempts to identify performance problems automatically by collecting and integrating a wide range of performance， configuration and availability data.。 PDT consists of three components， the collection component comprises a set of programs that periodically collect and record data， the retention component periodically reviews the collected data and discards data that is obsolete， and the reporting component periodically produces a diagnostic report from the current set of historical data.。 PDT contains motif-based， AIX licensed programs that can easily access tools for system and network performance tuning， monitoring， and analysis.。 PDT assesses the current state of a system and tracks changes in workload and performance. It attempts to identify incipient problems and suggest solutions before the problems become critical.。
下列用于板材连接和圆风管闭合连接的咬口加工的机器是（）。 压槽机。 滚槽机。 咬口机。 折边机。
Which command will increase the contiguous free space of a file system without having to add additional partitions？（） chfs。 fsck。 chlv。 defragf。
收入类账户的借方登记（）。 负债增加。 收入增加。 收入转销。 费用减少。
弥散性血管内凝血时，其实验室检查下述哪项不符（） 血小板计数进行性下降或<100×10↑<9>/L。 凝血酶原时间延长对照3S以上。 纤维蛋白原<1.5g/L。 优球蛋白〉120分。
根据耶克斯――多德森定律，当学生从事较容易的作业时，教师应使其心理紧张程序控制在（）
