溶血反应发生时，护士首先应（）
A.立即停止输血
B.通知医师
C.测量血压及尿量
D.静脉滴注4%碳酸氢钠
E.皮下注射肾上腺素
参考答案：A
— What were you doing at this time yesterday?
— I _______ basketball with my friends. [ ]
A. was playing
B. had played
C. have played
D. played
运用实物期权方法进行房地产投资决策时，对房地产市场不确定、投资风险的不确定性，可通过（）确定是否进行投资。
A.等待投资型期权估价
B.放弃型期权估价
C.成长型期权估价
D.柔性期权估价
