题目内容

集中器不能抄读部分载波表的原因有如下哪些原因（）

A. 路由的运行模式，失败表的表端载波芯片不能兼容
B. 台区划分不明确，抄不到的表不属于该集中器抄读的台区
C. 抄不到的表与能抄到的电表之间距离太远，无法建立中继
D. 抄不到的表与能抄到的电表之间不存在大衰减点

查看答案

搜索结果不匹配？点我反馈

更多问题

Examine the contents of SQL loader control file: Which three statements are true regarding the SQL* Loader operation performed using the control file?（）

An EMP table is created if a table does not exist. Otherwise, if the EMP table is appended with the loaded data.
B. The SQL* Loader data file myfile1.dat has the column names for the EMP table.
C. The SQL* Loader operation fails because no record terminators are specified.
D. Field names should be the first line in the both the SQL* Loader data files.
E. The SQL* Loader operation assumes that the file must be a stream record format file with the normal carriage return string as the record terminator.

查看答案