题目

In our life, we don’t often express our gratitude(感激) to the one who has lived those years with us. In fact, we don’t have to wait for anniversaries(周年纪念日) to thank the ones close to us --- the ones so easily overlooked(忽视). If I have learned anything about giving thanks, it is time to give it now! While your feeling of appreciation is alive and sincere, act on it. Saying thanks is such an easy way to add to the world’s happiness. Saying thanks not only brightens someone else’s world, it brightens yours. If you’re feeling left out, unloved or unappreciated, tr综合实践活动小组的同学利用所学知识测量鸡蛋的密度．该小组设计的实验步骤如下：A．用天平测出鸡蛋的质量m：B．按如图所示的步骤来测量鸡蛋的体积V：C．根据测量数据算出鸡蛋的密度ρ=m/V一位同学认为该实验过程误差较大，请你指出可能产生误差的主要环节并提出改进意见（可画简图并配文字说明）．