Укажите пожалуйста, в каком предложении использован независимый причастный оборот. 1. The electron is about as large as a nucleus, its diameterbeing about 10-12 cm. 2 . Metals do not melt until heated to a definite temperature....

Укажите пожалуйста, в каком предложении использован независимый причастный оборот. 1. The electron is about as large as a nucleus, its diameterbeing about 10-12 cm. 2 . Metals do not melt until heated to a definite temperature. 3 . Mercury is used in barometers, having a great specific gravity.