Why isn't milk and soymilk solution

Why isn't milk and soymilk solution

----Main ingredients: protein
----Protein, like starch, is a kind of polymer with particle diameter between 1 nm and 9 nm
----Milk and soybean milk are colloids
----Milk and soybean milk have colloidal properties: dingdar phenomenon
----Milk, soybean milk also contains a small amount of lactose molecules, which dissolved in water to form a solution
----Milk also contains a small amount of fat, which forms an emulsion in water
----To be exact, milk and soybean milk are mixtures of various dispersions, but they are generally regarded as colloidal solutions because their main components are proteins

A bottle of 300 ml beverage, the ratio of orange juice and water is 1:4, Xiaojing drink half, the rest of the beverage, the content of orange juice is ()
A. 20% B. 10% C. 25% d. no options

Because the content of orange juice is 11 + 4 × 100% = 20%, a

A bottle of 300 ml beverage, in which the ratio of orange juice to water is 1:4. After half of Xiaohong is drunk, the content of orange juice in the remaining beverage is 20%. Please explain in detail

That's right!
No matter how much you drink, as long as you don't mix water, the concentration will never change!
But it's hard to say if it's finished!

A bottle of 300 ml beverage, the ratio of orange juice and water is 1:4, Xiaojing drink half, the rest of the beverage, the content of orange juice is ()
A. 20% B. 10% C. 25% d. no options

Because the content of orange juice is 11 + 4 × 100% = 20%, a