问题:
A、the telecoms system employed by Singapore Airlines on board each plane is the best of the breed
B、Singapore Airlines has a self-contained telecoms system which enables it to set high international roaming rates
C、the calls will be charged at international roaming rates which are normally high
D、it will be a privilege to a small
B、Singapore Airlines has a self-contained telecoms system which enables it to set high international roaming rates
● 参考解析