随意

随意 Pop Quiz

This substance, added to water in some areas of the UK, is supposed to harden teeth.
Choose the right answer:
Option A fluoride
Option B colgatium
Option C fluorine
Option D magnesium
 missy3 posted 一年多以前
跳过问题 >>
save
Cookies help us bring you Fanpop. By using Fanpop, you agree to our use of cookies. Learn More Got It!