1, pitch discrimination, the kind of one tone (single tone), within four degrees, are all pitches, the kind without ascending and descending symbols, that is to say, they are all white keys.
2. Listen to the interval, choose the corresponding interval according to the prompt of the interval, fill in the blanks and write down which interval it is.
There are many kinds of classes in the market, such as English, accounting and dancing ... As long as there is a great demand for