Regarding the operating principle of a reverse-osmosis type freshwater generator, what statement is true?

Question

Accepted Answer

External pressure is applied to the side of strong concentration forcing freshwater through the semi-permeable membrane to the side of weak concentration.

Answer

External pressure is applied to the side of strong concentration forcing salt through the semi-permeable membrane to the side of weak concentration.

Answer

External pressure is applied to the side of weak concentration forcing salt through the semi-permeable membrane to the side of strong concentration.

Answer

External pressure is applied to the side of weak concentration forcing freshwater through the semi-permeable membrane to the side of strong concentration.

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