Fill in the blank: On a Night

Which two of the following tasks would most likely be completed by a biomedical engineer

An eighth-grade teacher has asked you to present information to her students about how watching television can affect adolescents’ academics and behavior. what important information should you share with this audience? write an essay that will serve as the basis for the speech you will deliver to the students. include important details from the selection "television and adolescents" to support your discussion.

Riddle me this: i am first in earth,second in heaven,appear two times in aweekyou can only see meonce in a year, althoughi'm in the middle of sea.what am i?