【简答题】二阶环节 G (s)=10/( s 2 +3.6 s +9) 的阻尼比为() 。
【多选题】Which motor is primary if AC power is available?
A.
Squirrel-cage induction motor
C.
wound-rotor induction motor
【单选题】二阶环节G(s)=10/(S 2 +3.6S+9)的阻尼比应为()
【单选题】二阶环节 G ( s )=10/( s 2 +3.6 s +9) 的阻尼比为( )。
【单选题】Django 2.2 restful应用中,定义视图类时需要给________字段赋值,以便视图返回时数据模型数据
【单选题】A burning AC motor would be considered what class of fire?
【单选题】Django 2.2 restful应用中,数据模型类为User,获取该模型所有数据的写法是______。
【简答题】django restful应用中须添加那个app后,方能对用户进行基于令牌(token)的身份验证________________。
【单选题】The energy consumed by an AC motor, as strictly reactive power, is ____.
A.
used to do mechanical work
B.
used to establish the magnetic field of the motor
C.
lost as heat generated by the windings
D.
lost in doing work to turn the motor itself
【简答题】Django restful应用中http方法GET 、POST、_____________、DELETE分别用于获取、提交、更新、删除网络资源。