A.10S B.20S C.30S D.40S
A.小明的手機型號太老舊了 B.雙頻網(wǎng)關WIFI壞了 C.測速軟件選擇不正確 D.網(wǎng)關擺放位置不正確
A.0-10mm B.10-30mm C.30-50mm D.50-70mm