cây lúa và cây lạc đều là những cây có sản phẩm chúng ta dùng làm lương thực, thực phẩm, vậy tại sao lại không xếp chúng vào cùng một lớp? Em hãy chỉ ra các đặc điểm cơ bản giữa hai cây?

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