题目

How I Turned to Be Optimistic        I began to grow up that winter night when my parents and I were returning from my aunt's house, and my mother said that we might soon be leaving for America．We were on the bus then．I was crying, and some people on the bus were turning around to look at me．I remember that I could not bear the thought of never hearing again the radio program for school children to which I listened every morning．        I do not remember myself crying for this reason again．In fact, I think I cried very little when I was saying goodbye to my friends and re1．短周期元素X、Y、Z、W在元素周期表中的相对位置如图所示，其中Z为地壳中含量最高的金属元素．下列说法正确的是（　　）      XY Z   WA．工业上电解YW饱和溶液冶炼金属YB．气态氢化物的稳定性：W＞XC．Y、W的最高价氧化物的水化物均能溶解金属ZD．简单离子半径的大小顺序：r（Y+）＞r（X-）