- 搜標(biāo)題
- 搜題干
- 搜選項(xiàng)
單項(xiàng)選擇題
ELT的測(cè)試頻率是？（）
A.123.5MH
B.121.5MH
C.121.5HZ
D.121.5KH
A.123.5MH
B.121.5MH
C.121.5HZ
D.121.5KH
