未知题型 How does the author now keep in touch with friends when at sea?A.By making telephone calls from time to timE.B.By sending and receiving e-mail on board their boat.C.By sending faxes with their laptop computer.D.By creating a radio-updated Website on the Internet

单项选择题 根据基金的运作方式的不同，证券投资基金可划分为（　　）

单项选择题 根据《证券公司监督管理条例》，我国负责对证券公司的退出实施监管的机构是（　　）