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单项选择题

According to the article, what does the word "concurrently"(Par

A．4) meanA. At the same time.B. One at a time.C. In order.D. Not currently.

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单项选择题What is true about the Connexion service to cruise ships and oil exploration platforms

A．Boeing is trying to provide them with the service.
B．They cannot get the service now because the sky is limited.
C．The service is not available to them now as Boeing is busy servicing the fliers.
D．They can get the service because they are in the limit of the project.

单项选择题Which of the following statements about Connexion is FALSE

A．Boeing planes worldwide will have this service by 2005.
B．The service will cost between $6 and $25 an hour.
C．The phased-array antenna is an important aspect of Boeing' s new service.
D．The service on works at speeds of less than 1. S Mb per secon