排水泵站使用的三相交流电的频率为100HZ
参考答案：错
The preferred stock of the Delco Investments Company has a par value of $150 and a dividend of $11.50. A shareholder's required return on this stock is 14%. What is the maximum price he would pay（）
A. $82.14.
B. $150.00.
C. $54.76.
WLANAP退服率指标要求为（）。
A.≤1.0%
B.≤1.2%
C.≤1.5%
D.≤1.8%
