题目

The school was across the street from our home and I would watch the kids as they __1__ during the break. She seemed so small as she __2__ her way through the crowd of boys on the playground. She stood out from them all. I began to notice her at other times, basketball in hand, playing __3__. She would practice dribbling （运球） and shooting over and over again, sometimes until dark. One day I asked her __4__she practiced so much. She looked_5__ in my eyes and without a moment of__6__ she said, “I want to go to college. The only way I can go is if I get a（an）__7__. I am going to plaA图表示硝酸钾和氢氧化钙的溶解度随温度变化的情况．B图中甲、乙试管分别盛有硝酸钾、氢氧化钙的饱和溶液，试管底部均有未溶解的固体．烧杯中盛有水，并加入固体硝酸铵．（1）请你描述甲试管中会出现的现象（2）在此变化过程中，乙试管里氢氧化钙溶液中溶质的质量分数如何变化？并解释其原因．