The Three Main Categories of Drugs. Some drugs due to certain factors that change their characteristics, may cause them to fall under different categories at different times. For example, even though Cannabis is considered a depressant, in high enough doses it can also be a hallucinogen. The three main categories were constructed based on similarities that certain drugs share; however, there are many differences that these drugs have also.
A rhythm is very identifiable, even if the composer changes all the notes and the harmonies. Because of this, Beethoven use the rhythm of the Fate motif loads of times all throughout the 5th symphony, to tie it together. The Fifth symphony, like all symphonies at the time, is in four movements... 1  1st Movement, Sonata. 2  The powerful first movement opens with the Fate motif, which runs through it in one way or another throughout.
This is the form used in the first movement (and sometimes in other movements) of all 18th and 19th century symphonies. The sections run together, but it's usually possible to tell where one ends and the next begins. Introduction Slow and stately, in a different tempo than the rest of the movement.