Figure 1.
Example of the presentation of images and the question slides. There were white blank slides that are not presented in this example shown between images that lasted 1.5 seconds.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.