TOEFL Listening: ETS-TOEFL听力机经 - IIA5N11034RU_4LLP$

Why does the professor mention that once nucleation has occurred, added heat is used to convert liquid water into water vapor? A. To explain why the temperature of water does not rise beyond the boiling point when water is heated in a metal pot on a stove B. To point out similarities in heating liquids using microwave ovens and using conventional stoves C. To explain why water that is exposed to microwaves will appear to be hot when it really is not D. To point out that it is better to avoid making coffee in a microwave oven