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【单选题】
若有以下函数调用语句:fun(a+b,(x,y),fun(n+k,d,(a,b,c))); 则此函数调用语句中实参的个数是( )。A.
2
B.
3
C.
4
D.
5
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【单选题】The energy consumed by an AC motor, as strictly reactive power, is_____ .
A.
used to do mechanical work
B.
lost in doing work to turn the motor itself
C.
used to establish the magnetic field of the motor
D.
lost as heat generated by the windings
【简答题】二阶环节 G (s)=10/( s 2 +3.6 s +9) 的阻尼比为() 。
【简答题】锯条通常使用什么材料经如何处理制成?
【多选题】Which motor is primary if AC power is available?
A.
Squirrel-cage induction motor
B.
synchronous motor
C.
wound-rotor induction motor
D.
universal motor
【简答题】django restful应用可通过rest_framework.pagination.PageNumberPagination实现分页,__________属性用于定义每页包含的数据条目。
【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
A.
querysets
B.
queryset
C.
objects.all()
D.
serializer_class
【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______。
A.
User.object.all()
B.
User.objects.getAll()
C.
User.objects.all()
D.
User.object.getAll()
【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
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