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【单选题】
Synchronous reactance represents the three-phase symmetrical and stable operation of synchronous motor ().
A.
A comprehensive parameter of the magnetic field of armature reaction
B.
A comprehensive parameter of air gap synthesis magnetic field
C.
A comprehensive parameter of armature reaction magnetic field and armature leakage magnetic field
D.
A comprehensive parameter of excitation field and excitation leakage field.
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【单选题】In the sensitivity analysis of linear programming, it is ( ) that will change the value of the optimal objective function.
A.
The change of objective coefficient Cj
B.
The change of constraint constant bi
C.
Add a new variable
D.
Add a new constraint
【单选题】Kawa Karpo is believed to be the protector of the ______ sect in Tibetan Buddhism.
A.
white
B.
yellow
C.
red
D.
striped
【单选题】A three-phase synchronous generator runs stably under a symmetrical load( ) At this time, the armature reaction property is ( ).
A.
Straight-axis magnetic armature reflection;
B.
There are both straight-axis demagnetic armature reaction and cross-axis armature reaction;
C.
There are both straight-axis magnetic armature reactions and cross-axis armature reactions;
D.
There are both straight-axis armature reactions (demagnetization, magnetism-assistant) and cross-axis armature reactions.
【单选题】下列有关胸痛三联征CTA检查时对比剂注射方案的叙述,错误的是()
A.
使用高压注射器注射
B.
常规左肘静脉团注
C.
注射总量40~60ml
D.
注射速率4.0~6.0ml/s
E.
碘对比剂浓度300~370mgI/ml
【单选题】In Tibetan culture, "Meili Snow Mountain" means ______.
A.
a high mountain
B.
a sacred mountain
C.
a dangerous mountain
D.
the mountain of the medicine king
【单选题】When the synchronous generator is running in a steady state, if the load is inductive , the nature of its armature reaction is ().
A.
Cross-axis armature reaction
B.
Straight-axis demagnetization armature reaction
C.
Straight axis demagnetization and intersectional armature reaction
D.
Straight axis magnetization reacts with cross-axis armature
【单选题】双源CT行胸痛三联征CTA检查时,可变螺距与心率的关系是()
A.
螺距不随心率变化而变化
B.
螺距随心率增加而增加
C.
螺距随心率增加而减少
D.
屏气后心率变化较大时,螺距不改变
E.
螺距由操作技术员决定
【单选题】For the standard linear programming problem, the following statement is wrong ( )
A.
In the sensitivity analysis of new variables, if the new variables can enter the basic variables, the objective value will be further improved
B.
In sensitivity analysis with new constraints, the value of the new optimal objective value cannot be increased
C.
When a constraint constant bk increases, the value of objective value will increase
D.
When the objective coefficient of a basic variable increases, the objective value will be improved
相关题目：
【单选题】In the sensitivity analysis of linear programming, it is ( ) that will change the value of the optimal objective function.
A.
The change of objective coefficient Cj
B.
The change of constraint constant bi
C.
Add a new variable
D.
Add a new constraint
【单选题】Kawa Karpo is believed to be the protector of the ______ sect in Tibetan Buddhism.
A.
white
B.
yellow
C.
red
D.
striped
【单选题】A three-phase synchronous generator runs stably under a symmetrical load( ) At this time, the armature reaction property is ( ).
A.
Straight-axis magnetic armature reflection;
B.
There are both straight-axis demagnetic armature reaction and cross-axis armature reaction;
C.
There are both straight-axis magnetic armature reactions and cross-axis armature reactions;
D.
There are both straight-axis armature reactions (demagnetization, magnetism-assistant) and cross-axis armature reactions.
【单选题】下列有关胸痛三联征CTA检查时对比剂注射方案的叙述,错误的是()
A.
使用高压注射器注射
B.
常规左肘静脉团注
C.
注射总量40~60ml
D.
注射速率4.0~6.0ml/s
E.
碘对比剂浓度300~370mgI/ml
【单选题】In Tibetan culture, "Meili Snow Mountain" means ______.
A.
a high mountain
B.
a sacred mountain
C.
a dangerous mountain
D.
the mountain of the medicine king
【单选题】When the synchronous generator is running in a steady state, if the load is inductive , the nature of its armature reaction is ().
A.
Cross-axis armature reaction
B.
Straight-axis demagnetization armature reaction
C.
Straight axis demagnetization and intersectional armature reaction
D.
Straight axis magnetization reacts with cross-axis armature
【单选题】双源CT行胸痛三联征CTA检查时,可变螺距与心率的关系是()
A.
螺距不随心率变化而变化
B.
螺距随心率增加而增加
C.
螺距随心率增加而减少
D.
屏气后心率变化较大时,螺距不改变
E.
螺距由操作技术员决定
【单选题】For the standard linear programming problem, the following statement is wrong ( )
A.
In the sensitivity analysis of new variables, if the new variables can enter the basic variables, the objective value will be further improved
B.
In sensitivity analysis with new constraints, the value of the new optimal objective value cannot be increased
C.
When a constraint constant bk increases, the value of objective value will increase
D.
When the objective coefficient of a basic variable increases, the objective value will be improved
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