i have tried to find job posting about graphics design for entry level job.
however, most of them demand about 3 years experience. I have met most of their requirement for graphic design in computer software. I also have three internship experience in different companies during my school which was related to their demand field : advertising, newspaper, publishing .
Is it appropriate for me to apply job which required at least 1 or 2 years of experience?
I have hard time trying to find entry job in this field.
can you give me some resources about graphic designer entry level job.
I hope to know which place has a demand for graphic designer
in US.

You should take a look at GetAFreelancer:

http://www.nettrafficsecrets.com/res/GAF

There are many graphic design jobs posted constantly and they will always accept new graphic designer. Opening account is free. Write a good profile and include some examples of your previous work. Also bid for as many jobs as you can at the same time to increase your chance for winning projects.

You can find some great tips on how to win a bid here:

http://www.squidoo.com/online_jobs

Best regards,