题目内容

关于牵引变电所说法正确的是()。

A. 根据制式不同,可分为直流牵引变电所和交流牵引变电所
B. 主要供电对象是车站机电设备
C. 将中压电能转换为低压电能
D. 是运营安全、行车安全、防灾安全及应急处理等动力照明供电的保障

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You need to ensure the Order Control team is able to track the number of orders that reach the production department. What should you do?()

A. Create a new Time dimension based on the Holiday table. Use derived columns for the month and the year.
B. Create a Server Time dimension. Within this dimension, enable the time periods year, month, and date. Select the Additional Manufacturing calendar option.
Create a new Time dimension based on the date values within the ProductOrderStatus table. Flag those days on which no orders were received as Holiday.
D. Create a new Time dimension based on a data source view named query. Derive the data for this data source view from unique dates within the ProductOrderStatus table. Use a subquery to identify the holidays and derived columns for the month and the year.

()1953年初视察三峡时曾说:“三峡水利枢纽是需要修建而且可能修建的”,“但最后下决心确定修建及何时开始修建,要待各个重要方面的准备工作基本完成之后,才能作出决定。”

A. 蒋介石
B. 孙中山
C. 毛泽东
D. 周恩来

TADS的全称为()。

A. 客车故障轨边图像检测系统
B. 车辆轴温智能探测系统
C. 车辆滚动轴承故障轨边声学诊断系统
D. 车辆运行品质轨边动态监测系统

什么是设备检修停机时间定额?

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