flute. Flute is the main treble melody instrument in modern orchestral music and chamber music, and flute is one of the oldest members of the modern known musical instrument family. The degree of studying abroad for doctor of music includes bachelor's degree, master's degree, expert degree and doctor's degree. Among them, doctoral degrees include associate doctoral degrees and doctoral degrees. Among them, the associate doctoral degree may correspond to the doctoral degree in Europe and America, that is, PhD. Students who have obtained an associate doctorate obtain a doctorate by continuing their studies for a period of time, submitting dissertations and defending. A doctorate is equivalent to a full professor in the United States. The doctoral degree mentioned by the subject should refer to the associate doctoral degree in Russia. In addition, it should be noted that the Russian associate doctor's degree is awarded not by universities, but by academic degree evaluation committee. So the gold content is high.