下列各项中，对封闭式基金的认识不正确的是（）。

A.经核准的基金份额总额在基金合同期限内固定不变

B.基金份额可以在依法设立的证券交易所交易

C.基金份额持有人不得申请赎回

D.投资者可以通过证券经纪商在一级市场和二级市场进行基金的买卖

Electronic mail, or mail, as it is known to its many fans, has been around for over two decades. Typically, email systems support five basic functions, as described below. (41) refers to the process of creating messages and answers. (42) refers to moving messages from the originator to the recipient. (43) has to do with telling the originator what happened to the message. Was it rejected Was it lost (44) incoming message is needed. So people can read their email. (45) is the final step and concerns what the recipient does with the message after receiving it.

A．Composition

B．Transfer

C．Reporting

D．Displaying