On the sea 和in the seaColorful sailing boats are swimming on the sea还是Colorful sailing boats are swimming in the sea= =

in the sea还是on the sea boat和ship分别是in the sea 还是on the sea at sail in the sea还是 sail on the sea travel in the sea 还是 travel on the sea.. On the sea 和in the seaColorful sailing boats are swimming on the sea还是Colorful sailing boats are swimming in the sea= = in the sea on the sea,at sea有什么区别 Mount Qomolangma.on land.in the sea.in the world. Mount Qomolangma.on land.in the sea.in the world. They can swim in the sea [on] New Year's Day.为什么填 on 不填in . sea 和at the sea We () in the sea in the sea 和on the lakerow in the sea和row on the lake在我们的教科书上都出现过,用in和on意思有没有不同? Many people like windsurfing------(in the sea ,on the sea)选什么,这两者怎么区分? I am rowing in the sea.为什么不是on the sea? in the sea ,on the sea ,at sea 有什么区别,可你没给我解释on the sea呀 On land as in the sea, ..On land as in the sea, living lights can be deceiving. When they are hungry, some female fireflies lure the males of other species to them.What's the meaning of living lights Some enjoy the sun ( )a.in the sea b.in the shell c.on the beach by the sea shore 和on the sea shore 有什么区别啊?