题目内容

记整数规划问题的目标函数最大值为Z*。则任意一个可行解对应的目标函数值是Z*的一个下界。

A. 对
B. 错

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0-1规划问题仅有有限多个个行解

A. 对
B. 错

Lesson 8 拓展-2Listen and fill in the blanks with what you have heard.[音频]The controller informs BAW937 that the problem of Airbus 320 seems to be 1 because it is being2 off the runway. The Airbus 320 suffered a 3 and further delays are expected because 4 are 5 . BAw937 is told to prepare for 6 .

Lesson 22 拓展Fill in the blanks with what you have heard.[音频]1.The controller reminds Finnair 2115 to taxi with caution because a 1 is 2 to the 32.SIA107 has finished 4 10 minutes ago and the de-icer trucks has left. They requests 5 to meet their slot time of 6 , but the controller allocates them a new slot time of 7 and tells the crew to expect 8 because 9 are building up on 11_at the end of the taxiway.Finnair 2115 is taxiing slowly to the intersection and they see 10 is just moving off and the controller instructs them to taxi 12 and be careful about13 and14 reported.

Lesson 6 拓展[音频]Listen and fill in the blanks with what you have heard.BAW937 is instructed to taxi to holding point ____1___runway ____2__via taxiway ____3__. .After reaching the holding point, BAW937 is told to maintain position to wait for the ____4_______to ____5___runnway ___6___. After a while, he is ordered to ____7____and prepare for departure . But very soon the controller cancels line up and asks him to hold position because the Airbus 320 seems to have a problem and has ___8_____on the runway.

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