备用的主要发供电设备，不能按调度规定的时间投入运行，应算（）。 事故。 一类障碍。 三类障碍。
The transportation department requested a shipping cost report to list the resources used by each department. A separate page should be product for each department. Which property would you modify to achieve these results?（） Minimum widow records. 。 Column mode. 。 Spacing 。 Print direction. 。 Source F maximum records per page. 。 Maximum records per page.。
开井时，控制屏总开关合上后，要求工作电压为（） 1.15KV。 1.5KV。 1.1KV。 0.11KV。
Which two statements are true regarding the usage of the SQL*Loader utility（） You can load data into multiple tables during the same load session.。 You can load data from multiple files to a table during the same load session.。 You cannot perform selective data loading based on the values available in the records.。 You can use an export file generated by the EXPDP utility as an input data file to load the data.。 You can load data only if the input file is available on the disk and tape but not in a named pipes.。
以下哪些情况属于可以终止合同义务的不可抗力因素（） 物价波动。 战争。 地震。 征服征收。
关节松动术的适应证：（）
