钢管壁厚规范:语法问题

来源:百度文库 编辑:查人人中国名人网 时间:2024/05/09 09:40:24
The nectar of flowers are ingested by woker bees and converted to honey in special sacs in their digestive systems.

这句话中,"are ingested"为什么是错误的?
谢谢:)

主语是nectar花蜜,不可数名词,应用is ingested