DS题,Set S consists of five consecutive integers , and set T consists of 7 consecutive integers. Is the median of the numbers in set S equal to the median of the numbers in set T? (1). The median of the numbers in set S is 0 (2). The sum of the numbers in set S is equal to the sum of the numbers in set. 我选的是B,答案是C,个人感觉一个第二条件,就可以推出S和T的中位数都是0了啊,为什么还需要第一个条件呢?求解释