A.船長(zhǎng)和大副 B.輪機(jī)長(zhǎng)和大管輪 C.水手長(zhǎng)和木匠 D.以上都是
A.1/2 B.1/3 C.2/3 D.1/4
A.1/2 B.1/3 C.2/3 D.1/4