Which scale is shown below?

Question

BlackTom AI · Accepted Answer

The major scale pattern is W-W-H-W-W-W-H (whole, whole, half, whole, whole, whole, half). Reading the written pitches one by one and checking the interval pattern identifies the key.

Relevant knowledge points:
- Major scales follow the W-W-H-W-W-W-H interval pattern.
- Key signatures: B major contains five sharps (F#, C#, G#, D#, A#).
- Natural minor and harmonic minor have different accidentals (natural minor: lowered 3rd, 6th, 7th; harmonic minor: raised 7th compared to natural minor).

Step-by-step reasoning and pitch identification:
1. Read the notes ascending (in bass clef as shown): B → C# → D# → E → F# → G# → A# → B.
2. Check intervals:
   - B to C# = whole step
   - C# to D# = whole step
   - D# to E = half step
   - E to F# = whole step
   - F# to G# = whole step
   - G# to A# = whole step
   - A# to B = half step
   These intervals match W-W-H-W-W-W-H exactly, so the sequence is a major scale built on B.
3. Count accidentals present: C#, D#, F#, G#, A# — five sharps, which is the key signature of B major.

Why the correct answer is correct:
- The pitch collection and interval pattern correspond exactly to B major; every scale degree matches the expected accidental for B major (raised 3rd, 6th, and 7th relative to B natural minor).

Why the other choices are incorrect:
- B natural minor would have notes B, C#, D, E, F#, G, A, B (no D#, no G#, no A#), so it does not match the accidentals shown.
- G major (one sharp, F#) uses G, A, B, C, D, E, F#, G — completely different pitch set.
- G harmonic minor (G, A, Bb, C, D, Eb, F#, G) has flats and a different tonic (G), so it does not match the written pitches.

Conclusion: The notes and interval pattern verify the scale is B major, matching the provided answer.

Which scale is shown below? 单项选择题

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