国有专业银行实行了以( )为经营原则的商业银行体制。
A．效益性
B．准确性
C．安全性
D．流动性
E．开放性
参考答案：A,C,D
24. The valley was _____ in sunlight, and the children were singing and jumping with joy
A．bathed
B．covered
C．swam
D．Surrounded
心房扑动的心电图特点。
