同学你好，该知识点来自沪江网校《初中水平直达雅思6.5分【剑桥全能随到随学班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学你好，
词语辨析可以通过英英解释了解区别：
[w]stockpile[/w]If people stockpile things such as food or weapons, they store large quantities of them for future use. 大量储备
•  People are stockpiling food for the coming winter.
人们正在为即将到来的冬天大量储备食物。

[w]stock[/w]If a shop stocks particular products, it keeps a supply of them to sell. 有…存货
•  The shop stocks everything from cigarettes to recycled paper.
该商店的存货包括香烟和再生纸等各种商品。

所以stockpile强调大量储备，stock强调有储存

希望对你有帮助哦o(∩_∩)o