A HEAD OF Là Gì："a head of " có nghĩa là gì? - Câu hỏi về Tiếng Anh Mỹ | HiNati

a head of là gì   thống kê arsenal “A head of” is used to count some things, like “a head of lettuce” or “a head of broccoli.” “Ahead of” is different. It means “in front of” or “further than.” For example, “They are ahead of us on the road” or “They are ahead of us in the competition.”

neopentan Neopentan, hay còn gọi là 2,2-dimethylpropan, là một alkan có 5 nguyên tử carbon và trong cấu trúc của nó có hai mạch nhánh

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