What indicator appears with certain codes to indicate that they are either new codes or something is different about them?

It takes two major muscles to form a kiss

Indicate whether the statement is true or false.

When using your portable radio, you must push the "press to talk" button and wait one second to before speaking. This is essential to effective communication to:

A) insure the entire message is transmitted. B) improve batter life in digital equipment. C) notify other users of you intention to broadcast. D) cellular telephone links are activated.