The following three concepts are essential to the OSI model:service,interface andA． networksB．applicationsC．protocolsD．layers
The following three concepts are essential to the OSI model:service,interface and
A． networks
B．applications
C．protocols
D．layers
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下列关于interface的说法正确的是：A．interface中可以有private方法B．interface中可以有final方法C．interface中可以有function实现D．interface可以继承其他interface
下列关于interface的说法正确的是：A．interface中可以有private方法B．interface中可以有final方法C．interface中可以有方法的具体实现D．interface可以继承其他interface