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【多选题】
城市轨道交通的自动化程度比较高,一般采用“ 与 相结合、以 系统 为主”的运用方式,列车的 不取决于地面信号机的显示,地面信号只起辅助作用。
A.
地面信号显示
B.
车载信号系统
C.
车载信号
D.
运行速度
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举一反三
【判断题】交流负反馈能改善交流性能指标,对直流指标也能改变
A.
正确
B.
错误
【单选题】维生素B12的活性中心元素是( )
A.
Co
B.
Fe
C.
Ni
D.
Zn
【单选题】为了保证样品管与对照管的反应条件一致,要求样品管与对照管要平行操作称为()
A.
平行试验
B.
平行实验
C.
垂直试验
D.
垂直实验
【判断题】交流负反馈能改善交流性能指标,对直流指标也能改善。()
A.
正确
B.
错误
【单选题】In Fisher’s model of group problem solving, the phase during which members end disagreement and solve the problem is called the _________ phase.
A.
orientation
B.
conflict
C.
emergence
D.
reinforcement
【单选题】维生素B12的活性中心元素是( )
A.
Fe
B.
Co
C.
Ni
D.
Zn
【单选题】In Fisher’s model of group problem solving, the phase during which members end disagreement and solve the problem is called the _________ phase.
A.
orientation
B.
conflict
C.
emergence
D.
Reinforcement
【简答题】Safety professional apply principles draw from such disciplines as engineering,education, psychology, physiology, enforcement, hygiene, health, physics, and management. They use appropriate methods an...
【判断题】交流负反馈能改善交流性能指标,不影响电路放大倍数
A.
正确
B.
错误
【简答题】We use an abbreviation EFFECT showing these principles. The first E stands for _____ , the first F stands for ____ , the second F stands for ____ , the second E stands for, C stands for____ , T stands...
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