What is used to remove roughness?
cartilage keratin hard tissue sandpaper scales ice lamphreys fluid
A B C D E F G H
Pavement smoothness is a lack of roughness.
sandpaper is used to remove roughness
What is used to remove roughness? (A) cartilage (B) keratin (C) hard tissue (D) sandpaper (E) scales (F) ice (G) lamphreys (H) fluid