题目内容
19.40波系统波段指的是频率在那个范围的波：
2024-07-10
A.192.1 THz—196.0 THz
B.192.15 THz—196.05 THz
C.187.0 THz—190.9 THz
D.186.95 THz—190.85 THz
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