题目

阅读下面短文，从短文后面各题所给的四个选项（A、B、C和D中，选出可以填入空白处的最佳选项。 The cultures of the East and the West really distinguish from each other a lot. This is because the culture systems are two 1 systems on the whole. The origin of the eastern culture is mainly from two countries: China and India. Both of the two cultures are gestated（孕育） by 2. In China, the mother river is the Yellow River, 3 the Indian one is the Hindu River. These two cultures have 4 for several thousand years and formed their own styles. Then in Tang Dyna已知集合A={1,2,3,4},B={y|y=,xA},则AB=A． {1,2,3,4} B．{1,2} C． {1,3} D． {2,4}