class of computer threats that appears to perform a desirable
function, but in fact to perform the undisclosed malicious
functions that allows unauthorized access to the host machine,
giving them the ability to save their files on the user's computer
or even to watch the user's screen and control the computer.
This not only makes students have great interests in computer,
but also enrich the cultural knowledge, playing a “Try to
persuade sentimentally and rationally, guide feeling and
emotion” role.