Which description of Harry Potter Series is true? A: The first book came out in 1998. B: The second book told the story of Sirius. C: The third book told the story of Sirius. D: The last book came out in 2003.
Which description of Harry Potter Series is true? A: The first book came out in 1998. B: The second book told the story of Sirius. C: The third book told the story of Sirius. D: The last book came out in 2003.
以下哪颗双星不属于目视双星？ A: Sirius B: Xi UMa C: Cygnus X-1 D: 61 Cygni
以下哪颗双星不属于目视双星？ A: Sirius B: Xi UMa C: Cygnus X-1 D: 61 Cygni
以下哪颗双星不属于目视双星？ A: Sirius B: Xi UMa C: Cygnus X-1 D: 61 Cygni
以下哪颗双星不属于目视双星？ A: Sirius B: Xi UMa C: Cygnus X-1 D: 61 Cygni
以下哪颗双星不属于目视双星？ A: Sirius B: Xi UMa C: Cygnus X-1 D: 61 Cygni
以下哪颗双星不属于目视双星？ A: Sirius B: Xi UMa C: Cygnus X-1 D: 61 Cygni
1