What were the substitutes for hard-paste porcelain?

In the exercise for the week, read the sentence carefully concentrating on the word noxious. using other words or phrases in the sentence to compose a student friendly definition.

Igotta why is there only 2 semesters and 4 quarters and not 4semesters and 4 quarters? 1 quarter for each semester? ? is this a dumb question?

Why is understanding the influence of theory important to being a competent communicator