aseven-seconddelaybetweentransmissionoftheradiosignalandwhenitcanbeheardoncomputerA.ItisB.ThereisC.IthasbeenD.Therehasbeen

Question

____ a seven-second delay between transmission of the radio signal and when it can be heard on computer
A.It is B.There is C.It has been D.There has been

Answer 1

选B
There be 句型表示“存在,有...”
There is s seven-second delay between the transmission of the radio signal and when it can be heard .
在收音机信号传播和被接收到之间有七秒的延迟.