Why is the water in the sea salty?用英语回答

Why is the water in the sea salty?用英语回答 Bill is in the lake,and the water is only up to his ankles,but he is in danger,why? Why the water is the origin of life on earth? Is the water in the river shallow? The water in the river is (harm) Where’s（）water?（）water is in the fridge. There is no water in the pool There is some water in the There___(is)any water in the bottle. is there any water in the bottle This is something s__ in the water Is there water in the lake There is l______ water in the bowl There is only----water in the bottle. there is some water in the why is ice-cold water rather than room temperature water used to wash the final product why is water important?Because. some steel wool is put into the test tube to trap the ice cube.Explain why water in the upper parts