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此星雲在梅西爾列表中的編號為何?
M69
M75
M87
M57
M39
M40
M41
M42
M78
N95
M88
M101
M31
MM巧克力
BT21
M27
M12
M21
M120
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8 questions
光敏電阻與LED基本認識
Worksheet
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10th Grade
7 questions
避孕大觀園
10th - 12th Grade