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【单选题】
某煤的空气干燥煤样高位发热量为Qgr,v,ad=25 MJ/kg,水分Mad=8%,氢含量Had=6%,则空气干燥煤样的低位发热量为( )MJ/kg。
A.
23.45
B.
25.2
C.
26.28
D.
27.12
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参考答案:
举一反三
【简答题】如果某一整数规划: MaxZ=X 1 +X 2 X 1 +9/14X 2 ≤ 51/14 -2X 1 +X 2 ≤ 1/3 X 1 ,X 2 ≥ 0 且均为整数 所对应的线性规划(松弛问题)的最优解为 X 1 =3/2 , X 2 =10/3 , MaxZ=6/29 ,我们现在要对 X 1 进行分枝,应该分为 和 。
查看完整题目与答案
【单选题】Chart/Publication correction record Card system ensures that every chart is properly corrected().
A.
in use
B.
prior to use
C.
after use
D.
When chart received on board
查看完整题目与答案
【多选题】有抗渗要求的混凝土应优先选用( )。[5分][5分]
A.
矿渣水泥
B.
普通硅酸盐水泥
C.
粉煤灰水泥
D.
火山灰水泥
查看完整题目与答案
【判断题】整数 x 进行 x % 2 == 0 的结果为 True ,则一定表示 x 是奇数。
A.
正确
B.
错误
查看完整题目与答案
【单选题】Chart correction record card system ensures that every chart is properly corrected .
A.
in use
B.
prior to use
C.
after use
D.
when chart received on board
查看完整题目与答案
【单选题】A revised print of a chart is made ______.
A.
after every major hydrographic survey of the area covered by the chart
B.
when there are numerous corrections to be made or the corrections are extensive
C.
when a low-stock situation occurs and minor corrections are made
D.
every two years to update the magnetic variation information
查看完整题目与答案
【判断题】若在对某整数规划问题的松驰问题进行求解时,得到最优单纯形表中,由 非整数分量 所在行得X 1 +1/7x 3 +2/7x 5 =13/7,则以X 1 行为源行的割平面方程为 6 / 7 - 1 / 7 X 3 - 2 / 7 X 5 ≤ 0 。
A.
正确
B.
错误
查看完整题目与答案
【单选题】Chart/Publication Correction Record Card System ensures that every chart is properly corrected .
A.
in use
B.
after use
C.
prior to use
D.
when chart received on board
查看完整题目与答案
【单选题】中国高速铁路无砟轨道的轨距标准是( )。
A.
1430mm
B.
1435 mm
C.
1420 mm
D.
1425mm
查看完整题目与答案
【单选题】Chart/Publication Correction Record Card system ensures that every chart is properly corrected
A.
in use
B.
prior to use
C.
after use
D.
when chart received on board
查看完整题目与答案
相关题目:
【简答题】如果某一整数规划: MaxZ=X 1 +X 2 X 1 +9/14X 2 ≤ 51/14 -2X 1 +X 2 ≤ 1/3 X 1 ,X 2 ≥ 0 且均为整数 所对应的线性规划(松弛问题)的最优解为 X 1 =3/2 , X 2 =10/3 , MaxZ=6/29 ,我们现在要对 X 1 进行分枝,应该分为 和 。
查看完整题目与答案
【单选题】Chart/Publication correction record Card system ensures that every chart is properly corrected().
A.
in use
B.
prior to use
C.
after use
D.
When chart received on board
查看完整题目与答案
【多选题】有抗渗要求的混凝土应优先选用( )。[5分][5分]
A.
矿渣水泥
B.
普通硅酸盐水泥
C.
粉煤灰水泥
D.
火山灰水泥
查看完整题目与答案
【判断题】整数 x 进行 x % 2 == 0 的结果为 True ,则一定表示 x 是奇数。
A.
正确
B.
错误
查看完整题目与答案
【单选题】Chart correction record card system ensures that every chart is properly corrected .
A.
in use
B.
prior to use
C.
after use
D.
when chart received on board
查看完整题目与答案
【单选题】A revised print of a chart is made ______.
A.
after every major hydrographic survey of the area covered by the chart
B.
when there are numerous corrections to be made or the corrections are extensive
C.
when a low-stock situation occurs and minor corrections are made
D.
every two years to update the magnetic variation information
查看完整题目与答案
【判断题】若在对某整数规划问题的松驰问题进行求解时,得到最优单纯形表中,由 非整数分量 所在行得X 1 +1/7x 3 +2/7x 5 =13/7,则以X 1 行为源行的割平面方程为 6 / 7 - 1 / 7 X 3 - 2 / 7 X 5 ≤ 0 。
A.
正确
B.
错误
查看完整题目与答案
【单选题】Chart/Publication Correction Record Card System ensures that every chart is properly corrected .
A.
in use
B.
after use
C.
prior to use
D.
when chart received on board
查看完整题目与答案
【单选题】中国高速铁路无砟轨道的轨距标准是( )。
A.
1430mm
B.
1435 mm
C.
1420 mm
D.
1425mm
查看完整题目与答案
【单选题】Chart/Publication Correction Record Card system ensures that every chart is properly corrected
A.
in use
B.
prior to use
C.
after use
D.
when chart received on board
查看完整题目与答案
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