房地产市场运行和价格变动的核心理论是（）理论。
A、市场供求
B、市场营销
C、价格
D、竞争
参考答案：A
-------Obama won the election, it's amazing!
-------Yes . But the result was within ______we had expected,_______brought great joy to many young people and the black .
A that which B that that C what what D what which
饮水试验为一种较方便、常用的吞咽功能评定法，其方法为嘱患者如往常一样饮用30ml温水，注意观察患者饮水过程，并记录饮水所用时间，以下哪种情况为正常（）
A.一饮而尽，无呛咳，5s之内喝完
B.2次以上喝完，无呛咳
C.一饮而尽，有呛咳
D.2次以上喝完，有呛咳
E.呛咳多次发生，不能将水喝完
