A.99.98% B.99.985% C.99.99% D.99.9%
A、越小 B、越大 C、趨于零 D、不變
A.載波項(xiàng) B.邊帶項(xiàng) C.載波項(xiàng)和邊帶項(xiàng)
A.10018KHz B.5658KHz C.5553KHz D.3467KHz