quiz photo
酸素の元素記号は何か?
generate
Mg
O
Rn
Na
correct ratio 0 % amount of answer 0 ticket 0

u_img
comment
reference:https://www.google.co.jp/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0CAYQjB1qFQoTCPSToqmw6cYCFUHkpgoddkMAGg&url=http%3A%2F%2Fxn--vck8crct486a4xr.com%2Fselect_suiso%2F&ei=4rysVfSaJMH
facebook twitter line line