几个英语语法的分析
1 Buyers and sellers should be aware of new development in technology can does affect marketing activities.
请帮我分析一下句型
2 Often very annoying weeds,goldnrods crowd out less hardy plants and act as hosts to many insect pests.
请帮我分析一下句型,并翻译
3 The continental divide refers to an imaginary line in the North American Rockies that divides the waters flowing into the Atlantic Ocean from those flowing into the Pacific.
请问此句中的that指的是什么?怎么分析出来的!