If you had chicken pox you didn't get it again why?

Which sentence best expresses the differing opinions of these two book reviews?

Nasa scientists must work together to make sure that everything is correct and accounted for when launching a shuttle. besides a physicist, what other type of scientist would be in making sure that the shuttle has the appropriate type and amount of fuel to reach its destination?

Which of the following is a way that minerals are used? a. industry construction technology d. all of the above