单项选择题
A.100GHz B.50GHz C.25GHz D.10GHz
A.-3dbm和-10dbm B.0dbm和-8dbm C.0dbm和-9dbm D.-3dbm和-8dbm
A.192.1THz—196.0THz B.192.15THz—196.05THz C.187.0THz—190.9THz D.186.95THz—190.85THz