单项选择题

British pronunciation usually refers to Received Pronunciation (RP). RP is the pronunciation of the British upper class; it is sometimes called the Queen’s English.

A．对
B．错

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Support of the answer could come from both the present study and other studies.

答案：正确

单项选择题

RIP采用UDP发送报文，使用的端口号是多少？

A．520
B．522
C．526
D．528