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听力原文：W: I don't know what to do about my job, every evening the boss asks us to work later and later. don't mind the extra pay, but I'm just about to stretch to my limit. M: Hum, well, maybe you should say something. He might not realize you're also a full-time student. Q: What does the man suggest doing? (18)A.
Looking for another job.
B.
Starting work later in the day.
C.
Talking to her boss about her schedule.
D.
Asking her boss for a raise in pay.
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A.
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B.
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C.
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D.
o povo da etnia Hui
【单选题】利用两阶段法求解线性规划问题时,如果在第一阶段求得的单纯形表如下,则( ) C j 0 0 0 1 1 C B X B b x 1 x 2 x 3 x 4 x 5 0 x 2 4 -4 1 0 1 0 0 x 3 10 1 0 1 -1 0 1 x 5 1 -2 0 0 -2 1 σ j 2 0 0 3 0
A.
当前解即为线性规划问题的最优解
B.
以 x4 作为换入变量，以x2作为换出变量，继续进行迭代
C.
该表为第一阶段的最优单纯形表，需要以（0,4,10） 作为基可行解，进行第二阶段的计算
D.
该表为第一阶段的最优单纯形表，但因为人工变量x5=1≠0，故线性规划问题不存在可行解，结束运算
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muçulmanos
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