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【单选题】

“Three Parallel Rivers” was identified as a ______ by UNESCO in 2003.

A.
World Cultural Heritage
B.
World Record Heritage
C.
World Fossil Heritage
D.
World Natural Heritage
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【判断题】In general, the dual simplex method is used to find the optimal solution for the parametric programming of the right constant b, and the simplex method is used to find the optimal solution for the par...
A.
正确
B.
错误
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【单选题】The reactance that mainly affects the maximum electromagnetic torque of synchronous generator is ()
A.
The stator leakage reactance
B.
Synchronous reactance
C.
Reactance of armature reaction
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【单选题】The kicks and bounces in the Worshiping Kwan-Yin are all at （ ） degrees.
A.
30
B.
45
C.
60
D.
90
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【多选题】in 1970s, the ______ grew to be a famous luxury-hotel brand in the _____ .
A.
Shangrila Hotel Chain
B.
Asian-Pacific region
C.
Shangrila Inn
D.
Southeast Asia
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【判断题】Transportation problem is also a special linear programming problem, but there are more variables and constraints. （ ）
A.
正确
B.
错误
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【多选题】下列有关CTU检查的叙述,正确的是()
A.
可通过降低管电流降低患者的辐射剂量
B.
可通过淘汰平扫降低患者的辐射剂量
C.
肾排泄期的扫描范围为全泌尿系,从肾上极至耻骨联合
D.
注射利尿剂呋塞米能改善CT尿路图像的总体质量
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【判断题】Since there are many variables and constraints in the transportation problem, the simplex method can not be used to solve ( )
A.
正确
B.
错误
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【单选题】Beat 5 in the Worshiping Kwan-Yin: Lift the left foot and land in front of the right foot to the ( ).
A.
upper right
B.
right front
C.
upper left
D.
left front
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【单选题】For a salient pole synchronous generator operating in parallel with infinite power grid, if the excitation is lost, the maximum electromagnetic power of the motor appears at the power angle of ( )
A.
B.
C.
D.
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【单选题】After the current flows through the generator winding, it will generate loss and heat in the conductor of the winding. This loss is called ().
A.
iron loss
B.
copper loss
C.
eddy-current loss
D.
Other loss
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