签约账户通过电话银行办理转账业务时可作为（）。
A、转入账户
B、转出账户
C、不能作为转出账户
D、不能作为转入账户
参考答案：A, B
An analyst has calculated the following ratios for a firm: Sales/Total Assets: 2.8 Net Profit Margin (%): 4 Return on Total Assets (%): 11.2 Total Asset/Equity: 1.6 The return on equity for this firm would be closest to:（）
A. 4.48%.
B. 6.40%.
C. 17.92%.
过滤式防毒面具，由面具和滤毒罐（或过滤元件）组成.
