题目

阅读理解 Thisis a list of some Chinese tea. GreenTea Greentea is the oldest and most popular type of tea. It has been enjoyed in Chinafor several thousand years. Green tea is made from the new shoots（芽） of the tea leaves which are dried and processed. Longjing may be themost well-known brand of green tea. BlackTea InChinese and the languages of neighboring countries, t black tea is known as redtea. It is made from the new T shoots of the tea leaves which arefermented（发酵） and dried. It has a lovely redcolor. Dianhong and Yixing are popular brands of black tea. WulongTea Wulongx 、y为两种元素的原子，x的阴离子与y的阳离子具有相同的电子层结构，由此可知(  ) A．x的原子半径大于y的原子半径。   B．x的电负性大于y的电负性C．x阴离子的半径小于y阳离子的半径D．x的第一电离能小于y 的第一电离能