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【单选题】
如图所示，下面叙述正确的是 。【图片】A.
支路数为5
B.
回路数为8
C.
节点数为4
D.
网为4
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反馈参考答案：
举一反三
【单选题】―What’s for dinner? I’m hungry． ―________．Dinner will be ready shortly．
A.
Take it easy
B.
Don’t mention it
C.
Forget it
D.
Be patient
【简答题】写出下列线性规划问题的对偶问题： (1)max z=2x 1 +x 2 +x 3 -x 4 (2)max z=4x 1 +5x 2 +3x 3 +6x 4 (3) (4)
【简答题】用隐枚举法求解下列问题：max z=3x 1 +2x 2 -5x 3 -2x 4 +3x 5 , s.t.x 1 +x 2 +x 3 +2x 4 +x 5 ≤4, 7x 1 +3x 3 -4x 4 +3x 5 ≤8， 11x 1 -6x 2 +3x 4 -3x 5 ≥3, x j =0或1(j=1,2，…，5).
【简答题】用割平面法求解 max(4x 1 +5x 2 +x 3 )
【单选题】Suddenly they see the moment for one of their best anecdote s, ....
A.
tedious meeting
B.
boring talk
C.
exciting chat
D.
amusing story
【简答题】max z＝3x13－4x1＋2x22－5x2＋2x3
【单选题】I was reading attentively in my own room ________ suddenly he knocked at the door.
A.
when
B.
while
C.
then
D.
as
【单选题】Most of us see a doctor ______ when we get a cold or something.This won't cost us a lot.
A.
suddenly
B.
immediately
C.
occasionally
D.
frequently
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