單項選擇題
A.2301.4 B.2298.7 C.2301.3 D.2298.6
A.2001.4 B.2001.3 C.1998.7 D.1988.6
A.1701.3 B.1701.4 C.1698.6 D.1698.7
A.14.7Hz B.25.7Hz C.27.9Hz D.26.8Hz
A.U2 B.載頻切換 C.閉環(huán)檢測 D.LU
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