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2 năm trước
I. Các nhóm chim Lớp chim rất đa dạng: Số loài nhiều, chia làm ........... nhóm: + .................................. + .................................... + .......................................... - Lối sống và môi trường sống phong phú. II. Đặc điểm chung của chim: - Lông........ - Chi trước............. - Mỏ............. - Nhiệt độ cơ thể: ..... - Trứng.................... III.Vai trò của chim: - Có lợi:................................. - Có hại:................................ Điền thêm vào chỗ trống
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