题目内容：

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

优质解答

in the sea 在海里例句与用法:Sealed containers of nuclear waste have been dumped in the sea.盛有核废料的密封容器被丢在海里.Swimming in the sea is great fun.在海里游泳很好玩.on the sea 在海（面）上例句...