制动电磁阀的电压工作范围为（）。 AC80～120V。 DC80～120V。 AC100～140V。 DC100～140V。
互生
溶血性贫血骨髓象特点，下列何项是正确的（） 有核细胞增生活跃。 除溶血危象及阵发性睡眠性血红蛋白尿外，各种溶血的骨髓象基本一致。 粒红比例倒置较其他增生性贫血显著。 以上都对。
某发明专利已经使用4年，尚可使用2年，目前该无形资产的贬值率为（）。 25%。 66.7%。 33.3%。 50%。
What are the steps required to perform a Preservation install on a server?（） Shutdown the server and boot it into SMS. Select SMS menu option OS Upgrade, Preservation install for the install type, and allow upgrade to run.。 Shut down the server and perform a network boot from a local NIM server. Select Presevation install for the install type, and allow upgrade to run.。 Shutdown the server and boot it into SMS. Select SMS menu option OS Upgrade, Presevation install for the install type, and allow for upgrade to run.。 Re-boot the server and NFS mount the bos images from a local NIM server. Run smit install. Select Presevation install for the install type, and allow upgrade to run.。
A user calls to report they are getting I/O errors on a file system. Which of the following tools should be used to isolate this problem？（）
