_____ is expected, according to the survey, is that prices of houses will not go up any longer.

A．It

B．As

C．Which

D．What

氨茶碱不加稀释，静脉注射过速易引起的严重不良反应为（）

A.剧痛

B.呼吸抑制

C.血栓性静脉炎

D.血压升高

E.血压骤降