Nicotine molecule chemical structure on blackboard
Palabras clave
addiction,
black,
blackboard,
board,
cancer,
chalk,
blackboard,
chemical,
chemistry,
cigarette,
class,
classroom,
college,
concept,
drawing,
drug,
education,
element,
formula,
green,
hand,
health,
learning,
lung,
medicals,
medicine,
model,
molecular,
molecular,
molecular,
nicotine,
school,
science,
signs,
smoke,
smoking,
stop,
structural,
structure,
student,
symbol,
teacher,
teaching,
text,
texture,
tobacco,
university,
white,
writing
){kind=link}