Michelangelo and Leonardo da Vinci used dissection in order to draw the human body more realistically

When e-mail is received from an unknown source, especially one containing an attachment, opening it can pose a risk of introducing

A) a chain letter. B) a virus. C) inappropriate material. D) unauthorized system access.

Stevens-Johnson syndrome may cause severe damage of which organ?

A) liver B) pancreas C) brain D) heart