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【单选题】
线性规划具有无界解是指( )A.
可行解集合无界
B.
有相同的最小比值
C.
存在某个检验数λ k >0且
D.
最中所有变量的检验数非零
E.
:C
F.
程度:中
G.
解析:
H.
:单选题2.线性规划具有多重最优指( )
I.
函数系数与某约束系数对应成比例
J.
表中存在变量的检验数为零 K. 解集合无界 L. 存在基变量等于零
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【单选题】According to the news, the plane crashed ______.
A.
shortly before it landed
B.
minutes after it took off
C.
after it cleared the mountain
D.
at the foot of the mountain
【单选题】You Need Courage! Shortly after I began a career in business, I learned that Carl Weatherup, president of PepsiCo （百事可乐公司）, was speaking at the University of Colorado. I tracked down the person handli...
A.
I began breathing again and we grabbed （霸占） an office right there at school and closed the door.
B.
As I sat listening to him, I knew that I could trust him, and that he deserved every bit of loyalty I could give to him.
C.
I became alarmed: his talk wasn't ending when it should have.
D.
He said that it took nerve for me to interrupt him, and that nerve was the key to success in the business wodd.
E.
I was told, however, that he was on a tight schedule and only had 15 minutes available after his talk to the business class.
F.
I handed him the card then I turned and walked out the way I came. 第 46 题 请选择（46）处的最佳答案．
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