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【单选题】
When the artificial variable method is used to solve the maximized linear programming problem, when all the test numbers σj≥ 0, but there are still artificial variables in the base variables, it indicates that the linear programming problem ( ).
A.
There are unique optimal solutions
B.
There are infinite optimal solutions
C.
There are unbounded solutions
D.
There are no feasible solutions
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【单选题】下列双源CT先心病扫描对比剂注射方案错误的是()
A.
5岁以下,浓度320的对比剂注射速率1.0-2.0 ml/s
B.
5岁以上,浓度320的对比剂注射速率2.0-3.0 ml/s
C.
成人,浓度320的对比剂注射速率5.0-6.0 ml/s
D.
5岁以下选择22G套管针
E.
成人选择20G套管针
【单选题】Those bottom-up stones rising from the ground are called _____.
A.
stalactites
B.
stalagmites
C.
marble
D.
pebbles
【多选题】Although both the Stone Forest and Jiuxiang are karst wonders, they are different because _____.
A.
one is on the ground
B.
the other is under the ground
C.
they have different causes for formation
D.
they have different scenery
【单选题】The three-phase stator windings of the generator are generally star connection, which is mainly to eliminate ().
A.
Accidentally harmonic
B.
Three times harmonic
C.
Five times the harmonic
D.
Higher harmonic
【单选题】The temperature measuring components of generator stator coil are usually buried in ()
A.
Upper bar notch
B.
Between lower bar and iron core
C.
Between upper and lower bars
D.
Lower wire bar notch
【单选题】How does the Jade Dragon Snow Mountain get the name?
A.
The totem of local people is dragon.
B.
There is a jade dragon sculpture in the mountain.
C.
The snow-capped peaks look like a jade dragon.
D.
The cloud view here resembles a jade dragon.
【单选题】The relationship between original programming and dual programming can be described as ( )
A.
The primal problem has a feasible solution, and the dual problem also has a feasible solution
B.
The dual problem has no feasible solution, and the original problem also has no feasible solution
C.
The primal problem has an optimal solution, while the dual problem certainly has no optimal solution
D.
The original problem has no bounded solution and the dual problem has no feasible solution
相关题目：
【单选题】下列双源CT先心病扫描对比剂注射方案错误的是()
A.
5岁以下,浓度320的对比剂注射速率1.0-2.0 ml/s
B.
5岁以上,浓度320的对比剂注射速率2.0-3.0 ml/s
C.
成人,浓度320的对比剂注射速率5.0-6.0 ml/s
D.
5岁以下选择22G套管针
E.
成人选择20G套管针
【单选题】Those bottom-up stones rising from the ground are called _____.
A.
stalactites
B.
stalagmites
C.
marble
D.
pebbles
【多选题】Although both the Stone Forest and Jiuxiang are karst wonders, they are different because _____.
A.
one is on the ground
B.
the other is under the ground
C.
they have different causes for formation
D.
they have different scenery
【单选题】The three-phase stator windings of the generator are generally star connection, which is mainly to eliminate ().
A.
Accidentally harmonic
B.
Three times harmonic
C.
Five times the harmonic
D.
Higher harmonic
【单选题】The temperature measuring components of generator stator coil are usually buried in ()
A.
Upper bar notch
B.
Between lower bar and iron core
C.
Between upper and lower bars
D.
Lower wire bar notch
【单选题】How does the Jade Dragon Snow Mountain get the name?
A.
The totem of local people is dragon.
B.
There is a jade dragon sculpture in the mountain.
C.
The snow-capped peaks look like a jade dragon.
D.
The cloud view here resembles a jade dragon.
【单选题】The relationship between original programming and dual programming can be described as ( )
A.
The primal problem has a feasible solution, and the dual problem also has a feasible solution
B.
The dual problem has no feasible solution, and the original problem also has no feasible solution
C.
The primal problem has an optimal solution, while the dual problem certainly has no optimal solution
D.
The original problem has no bounded solution and the dual problem has no feasible solution
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