question: comparators, flats, and microscopes could be used for observing materials how
choices.text: Balanced chemistry umderground underwater VOCs and NOx smooth environment up close
choices.label: A B C D E F G H
formatted_question: comparators, flats, and microscopes could be used for observing materials how (A) Balanced (B) chemistry (C) umderground (D) underwater (E) VOCs and NOx (F) smooth (G) environment (H) up close