【单选题】Here is ___ basket. ___ basket is mine.
【单选题】There ____ some meat in the basket.
【简答题】在互为对偶的两个线性规划中,已知对偶问题可行,当它的原问题[ ]时,则对偶问题就一定是无界的
【单选题】Here is ____ basket. ___ basket is mine.
【单选题】There _ plenty of _ in the basket. [ ]
【单选题】'There _______ some orange in the bottle, but there _______ any bananas in the basket. [ ]