休克患者扩容时首选________，宜用________。
参考答案：平衡盐溶液；碳酸氢钠等渗氯化钠溶液
某人在银行存5年期定期存款，年利息率为4%（单利），要使5年后取得12000元，现在应存入（）元。
A.4000
B.6800
C.8000
D.10000
In the dominant firm model of oligopoly, it is least likely that one firm:（）
A. is the innovation leader in product development.
B. has a significant cost advantage over its competitors.
C. produces a relatively large share of the industry’s production.
