A.5~10% B.10 ~15% C.15~20% D.20~25%
A. 3 B. 4 C. 11 D. 13 E. 14
A. Signal strength 0dBm, noise level 6dBm B. Signal strength 8dBm, noise level 9dBm C. Signal strength 4 dBm, noise level 4 dBm D. Signal strength 6dBm, noise level 5 dBm