题目内容
如果一个线性规划问题有可行解，那么它必有最优解。
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两个问题相对偶，若其中一个有可行解，另一个也一定有可行解。
There is no point in being a damn fool about it. Para.1It means " There is no sense in keeping trying if you don’t succeed after trying and trying again, or you will be a fool."
Well, yea, up to a point, but we all know that there’s a right and a wrong time to quit. Para.2"up to a point" means "to some degree"
The never-say-die spirit is best represented by the 19th century maxim.para.4The sentence means "The 19thCentury motto showed the spirit of never-giving-up."
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