对房地产子市场销售状况与销售潜力的调查，属于( )。
A．经济环境调查 B．市场行情调查C．市场反响调查 D．市场竞争情况调查
参考答案：B
—I paid 200 dollars for the necklace. I think it's much too expensive.
—Expensive? I don't agree with you. You so before you _______ it.
A．should have said; bought
B．have said; bought
C．had said; buy
D．must have said; should buy
虚寒性下利，便脓血者，治疗选用（）
A.桃花汤
B.白头翁汤
C.两者均是
D.两者均非
