实验室用溶质质量分数为6%的氯化钠溶液，配制50g溶质质量分数为3%的氯化钠溶液，请回答下列问题：

（1）配制的步骤：①____ ，②量取，③混匀．

（2）量取水时应选取量程为　____ 　（填“50mL”或“100mL”）的量筒，读数时视线与量筒内液体____ 保持水平．

（3）将配好的溶液倒入细口瓶时，有少量溶液溅出瓶外，所配溶液溶质质量分数____ （填“变大”“变小”或“不变”）

阅读理解，判断对错

      Simon is a good boy. Today is Sunday and it is fine, so Simon's father takes him to visit the Great Wall. The Great Wall is far away from his home. So they are going there by bus. The Great Wall is about six thousand seven hundred kilometres. It's very long and great. Simon is very happy and his father is happy, too.