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【单选题】
用大M法求解LP模型时,若在最终单纯形表上基变量中仍含有非零的人工变量,则原模型( )。A.
有可行解，但无最优解
B.
有最优解
C.
无可行解
D.
无界解
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参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【多选题】关于蛋白聚糖的叙述正确的是( )
A.
蛋白聚糖是一类糖蛋白，由一条或多条糖胺聚糖和一个核心蛋白共价连接而成
B.
蛋白聚糖中蛋白质的含量比糖的含量高
C.
蛋白聚糖中糖的含量高于蛋白质
D.
蛋白聚糖具有生物学功能
【简答题】阅读表达 Good morning,everyone.My topic(话题)for today is 'How Americans Value(重视) Time'. Americans think a lot about time.From childhood(童年)they learn to value time.As children, parents teach them to be on...
【简答题】根据句意，用所给单词的适当形式填空。 1. Diving is as (erous) as skiing 2. Today is the (bad) day in my life. 3. I have a friend (name) Max. 4. I never feel (bore) when he is with me. 5. He is _______(fat) of the th...
【单选题】物块重 W ,一力 F 作用在摩擦角之外,如图所示。已知力 F 作用线与铅垂线夹角θ=30度 ,摩擦角φm=20度 ,且W=F ,则 ___ 。
A.
物体静止
B.
物体下滑
C.
不能判定物体是否静止
【简答题】根据对话内容选项恰当的句子，有两项为多余的。 A. What time is it B. What day is it today C. What's the date today D. What can we do now E. Do you have a sharpener F. Let's go to the supermarket G. Let's to and see A: Excuse...
【简答题】蛋白聚糖多聚体由蛋白聚糖单体借____________和__________聚合而成。
【简答题】Dear mother, Today is Sunday. I ____ go to school. I stay ____ home. I'm writing to you now. Every day, I go to school ____ seven thirty in the morning. We have four lessons in the morning. We read an...
【简答题】Listen to the dialogue for the last time and fill in the blanks according to what you have heard. Lin Da: Is there anything new in the paper today? John: Yes. 1 __________________________. Lin Da: Wha...
【单选题】物块重 W ,一力 F 作用在摩擦角之外,如图所示。已知力 F 作用线与铅垂线夹角 ,摩擦角 ,且 ,则 ___ 。
A.
物体静止
B.
物体下滑
C.
不能判定物体是否静止
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