某动物精原细胞有三对同源染色体,分别是A和a、B和b、C和c,下列四个精子来自于同一个精原细胞的是( ) A.aBc、AbC、aBc、AbC B.AbC、aBC、abc、abc C.AbC、Abc、abc、ABC D.abC、abc、aBc、ABC 答案:ABecause of the financial crisis, days are gone _ _ local 5-star hotels charged 6,000 yuan for one night. A. if B. when C. which D. since