When the transmissions of a radio station have broken down, switched off or suspended, it is ___ . A. unfunctional B. break down C. off power D. Off airA、aB、bC、cD、d-易过题库-题库最全的搜题网站

When the transmissions of a radio station have broken down, switched off or suspended, it is ___ . A. unfunctional B. break down C. off power D. Off air

查看答案

试题详情

相关试题