商业银行发行金融债券需要具备的条件有（）。

A.良好的公司治理结构

B.核心资本充足率不低于4%

C.最近三年持续盈利，贷款损失准备计提充足

D.风险监管指标符合监管机构规定

E.最近一年内没有重大违法、违规行为

In the following essay, each blank has four choices. Choose the best answer and write down on the answer sheet.
Spread spectrum simply means that data is sent in small pieces over a number of the (16) frequencies available for use at any time in the specified range. Devices using (17) spread spectrum(DSSS) communicate by (18) each byte of data into several parts and sending them concurrently on different (19) . DSSS uses a lot of the available (20) , about 22 megahertz(MHz).

A．rate

B．velocity

C．bandwidth

D．period