【简答题】Suppose you won a free ticket to see EXO concert, and assume that it has no resale value. Assume that TFBOYS is performing on the same night and it's the most attractive alternative. If you don't go t...
【简答题】3组 "Then for about eight hours of each working day you will, I hope, be usefully employed. Assume you have gone through pharmacy school — or engineering, or law school, or whatever — during those eigh...