D major
https://en.wikipedia.org/wiki/D_major
D major (or the key of D) is a major scale based on D, consisting of the pitches D, E, F♯, G, A, B, and C♯. Its key signature has two sharps. The D major scale is:
![{
\omit Score.TimeSignature \relative c' {
\key d \major \time 7/4 d e fis g a b cis d cis b a g fis e d2
\clef F \key d \major
} }](https://upload.wikimedia.org/score/1/q/1qg9xuc8c9nt82i1vp3uu2cdlqths2q/1qg9xuc8.png)
D, E, F♯, G, A, B, and C♯.--就是依照『全全半全全全半』的情況,所以出現 F♯ C♯ (請見阿原錄製的影片)
阿原短影片
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然後查到這篇,一下子,連小調的意思,阿原也懂了