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

<pre id="xkmhu"><acronym id="xkmhu"></acronym></pre>

單項選擇題

Due to lapse of time the risk in these areas to surface navigation is now considered （）than the ordinary risks of navigation，but a very real risk still exists with regard to anchoring，fishing or any form of submarine or seabed activity.

A.more serious
B.not less serious
C.more dangerous
D.no more dangerous

你可能感興趣的試題

單項選擇題

Conditions for crossing a rough bar are usually best at （）.

A.low water slack
B.high water slack
C.high water ebb
D.high water flood

單項選擇題

Clearances of bridges and overhead cables below Bonneville Dam refer to heights in feet above mean （）.

A.lower low water
B.high water
C.low water
D.sea level

<ins id="pn5it"></ins>

<pre id="pn5it"><strong id="pn5it"></strong></pre>

<dl id="pn5it"></dl>