题目

To many people, the word Hollywood has two meanings. Hollywood is the name ofa town, but it also stands for movie making. Hollywood was just farmland at the beginning of this century. Early Americanmovies were made in other places such as New Yorkand Chicago. In 1917 a director was making a movie in Chicago. Because of cold weather, hecouldn't finish the movie. He took a trip to southern California, and there he found just theweather and scenery he needed to finish his movie. The director realized thatsouthern Californiawas the perfect place for making movies. The next year his company built“黑洞”是近代引力理论所预言的宇宙中一种特殊天体，在“黑洞”引力作用范围内，任何物体都不能脱离它的束缚，甚至连光也不能射出．研究认为，在宇宙中存在的黑洞可能是由于超中子星发生塌缩而形成的，2001年10月22日，欧洲航天局由卫星观测发现银河系中心存在一个超大型黑洞，被命名为：MCG6-30-15r．假设银河系中心仅此一个黑洞，已知太阳绕银河系中心做匀速圆周运动，则根据下列哪一组数据可以估算出该黑洞的质量（　　）A．太阳质量和运行速度B．太阳绕黑洞公转的周期和到“MCG6-30-15r”的距离C．太阳质量和到“MCG6-30-15r”的距离D．太阳运行速度和“MCG6-30-15r”的半径