测量话务量的单位是（）。 A: Erlang B: Bit/second C: Subscribers/kHz D: Subscribers/minute

哪个单位被用来测量话务量？（） A: Erlang B: Bit/second C: Hertz D: Subscribers/kHz E: Subscribers/minute

Publishers and subscribers do not transmit messages directly, but through broker.

Publishers and subscribers do not transmit messages directly, but through broker. A: 正确 B: 错误

The scene that he ___ is very vivid. A: described B: prescribed C: subscribed D: subscribers

哪个单位被用来测量话务量？（） A: Erlang B: Bit/second C: Hertz D: Subscribers/kHz

Because American cellphone users can choose either the prepaid service or pay as you go, cellphone subscribers have increased in number.