题目

已知X+、Y2+、Z-、W2-四种离子均具有相同的电子层结构，下列关于X、Y、Z、W四种元素的描述，错误的是（ ） A . 原子半径：X＞Y＞Z＞W B . 原子序数：Y＞X＞Z＞W C . 原子最外层电子数：Z＞W＞Y＞X D . 金属性：X＞Y，还原性：W2-＞Z- 答案：A() 10. In the past,the poor man for a long time every day.   A. was made to work   B. was made work   C. made to work   D. made work