- 搜標(biāo)題
- 搜題干
- 搜選項(xiàng)
單項(xiàng)選擇題
If you do NOT understand the course or intention of an approaching vessel you should sound （）.
A.one short blast
B.one prolonged blast
C.not less than five short blasts
D.not less than five prolonged blasts
你可能感興趣的試題
