What had the biggest impact on the advancement of surgical procedures ?

The consists of a mixture of gases and particles, including oxygen, nitrogen, hydrogen, carbon dioxide, water vapor, and dust.

Emma recently found out she was pregnant.every thursday evening for the next six weeks, emma and her mother will attend a special program that prepares pregnant teens to become mothers.during the first class, emma learned about the stages of childbirth.what was the order she was taught? first, emma learned about  .then, she learned about the    stage.next, emma learned about  .last, she learned about the    stage

Suki and lily decide to go to a party. lily drives them there and then drinks a lot of liquor in a short amount of time. lily then says tired and tells suki to get in the car because they're leaving. suki tells lily in a hesitant, low voice that she doesn't think lily is safe to drive.