97免费在线观看视频,亚洲综合自拍网,黄色毛片免费观看,热久久综合网,免费看日产一区二区三区狠狠操av,久久久涩涩涩,在线精品免费视频,人人插天天干,久久91精品国产91久久

單項選擇題

The full utilization of berths can be achieved if（）.

A.ships arrive at random
B.cargo-handing time varies greatly
C.ships have to queue to get onto berths
D.ships do not have to wait to get onto berths

你可能感興趣的試題

單項選擇題

The KM for a vessel may be determined by which of the following?（）.

A.Adding the KB and the BM
B.Subtracting the KB from the BM
C.Subtracting the GM from the KB
D.Adding the GM and the KB

單項選擇題

The material used extensively as electrolytic protection around bronze propellers is（）.

A.brass
B.copper
C.lead
D.zinc

<ins id="2suhu"></ins>