A. 正确 B. 错误
A. -20dBm~-14dBm和-24dBm~-10dBm; B. -20dBm~-14dBm和-31dBm~-14dBm; C. -20dBm~-14dBm和-19dBm~-10dBm; D. -19dBm~-10dBm和24dBm~-10dBm