单项选择题
A.2038Hz±0.01% B.2048Hz±0.01% C.2058Hz±0.01% D.2068Hz±0.01%
A.35.1GHz±0.1GHz B.35.1GHz±0.2GHz C.35.1GHz±0.3GHz D.35.1GHz±0.4GHz
A.8个 B.9个 C.10个 D.11个