Flame-retardant fabrics often have ________ atoms incorporated into the fabrics fibers.
A. N or O
B. N or Cl
C. Cl or Br
D. Cl or Cr
Answer:C
Flame-retardant fabrics often have ________ atoms incorporated into the fabrics fibers.
A. N or O B. N or Cl C. Cl or Br D. Cl or Cr