单项选择题
A.1024 B.2048 C.4096 D.8192
A.1/2 B.1/3 C.1/4 D.1/5
A.21.25–24.5GHz B.22.25–25.5GHz C.23.25–26.5GHz D.24.25–27.5GHz
A.23.5–26.5GHz B.24.5–27.5GHz C.25.5–28.5GHz D.26.5–29.5GHz
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