下载APP
【单选题】
The optimality condition of dual x method for linear programming is ( )
A.
All test numbers are not positive
B.
all artificial variables are zero
C.
the number of column b is not negative
D.
all the above conditions should be met
举报
参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【多选题】Why is the Jade Dragon Snow Mountain regarded as a treasure mountain for local people?
A.
the glacier
B.
precious wild animals
C.
various plants
D.
unique landscapes
【单选题】Synchronous generator stator rotating magnetic field has the characteristics of ().
A.
The number of magnetic poles and the speed of the rotor are the same, but the steering is different;
B.
The number of magnetic poles and steering is the same as that of the rotor, but the speed is different;
C.
It has the same speed and steering as the rotor, and the same magnetic pole logarithms.
【单选题】When the generator is running with pure resistance load, the phase difference between voltage and current is equal to ().
A.
180°
B.
90°
C.
0°
D.
5°
【单选题】The iteration of dual simplex method starts with ( ).
A.
the feasible solution of dual problem
B.
the optimal solution
C.
the feasible solution of the original problem
D.
the basic solution of the original problem
【单选题】When doing Beat 2 of the big Waist-twining Beating, lift up the right foot and withdraw to the right rear side with a distance about 40cm away from the left foot, point the tiptoe to （ ） degrees on t...
A.
30right
B.
45right
C.
45left
D.
30left
【单选题】When the generator is running with load, there is only energy () between the generator and the load.
A.
Consumption process
B.
Exchange process
C.
Consumption process and exchange process
D.
Not necessarily
【单选题】The array (λ1，,λ2……，λn）are the judgement coefficients in the optimal table of the canonical form original problem (max problem) , and the judgement coefficients of relaxation variables are（λn+1,λn+2,…...
A.
（λ1, λ2，……λn）
B.
(-λ1,-λ2,……,-λn)
C.
(-λn+1,-λn+2,……,-λn+m)
D.
( λn+1,λn+2,……,λn+m)
