以下对于风管选材要求中，正确的是（）。 所使用的板材、型材等主要材料应具有合格证明书或质量鉴定文件。 使用镀锌薄钢板要求表面洁净，不得有镀锌层结晶花纹。 不锈钢板加工和堆放避免与锈蚀的碳素钢材料接触。 当使用铝板时，铝板表面应避免刻划，不应有划伤等缺陷。 塑料复合钢板的表面喷涂层应色泽均匀，厚度一致。
课程评价包括（）、（）、（）三方面的评价。
Which of the following commands should be used to obtain a detailed output of the system error log?（） errpt -d 。 errpt -a 。 errpt -D 。 errpt -i /var/adm/ras/diag_log。
A system administrator needs to backup datavg which contains a database that pre-allocates files by padding them with nulls, similar to treating them as sparse files. In order to effectively backup and be able to restore the datavg files, which backup method should be used?（） savevg。 tar。 cpio。 mksy。
A customer needs a very small AIX system to run their new application and is considering a 1-way p615. What key information should the pSeries technical specialist provide to the customer？（） The 1-way p615 cannot be upgraded to a 2-way p615.。 The 1-way p615 can be upgraded to a 2-way p615 should additional capacity be required.。 The p615 can be upgraded to a POWER5-based processor.。 The p615 is not a good solution， as it does not take advantage of the Advanced POWER Virtualization features.。
Which of the following WLM commands should be used to monitor performance on a system running wlm？（）
