Answer: He is using Be prepared and Get experience
Explanation: If the speaker is presenting his speech several times to different friends and family friends is because he wants to get the experience of what is like to speak in front of others. Also, he wants to be prepared in all the process that it takes to speak in front of others, that goes beyond just talking, there is also a way of communicating with the audience.
This depends on the degree of the burn
Mucus
Cilia are the fingers that help move mucus up and out
17 seconds hope that helps<span />
They both worked with chemistry as their man science.