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Zippu2k
2 năm trước
Chọn một số hạt đỗ tốt, khô, bỏ vào cốc thủy tinh, mỗi cốc 10 hạt: cốc 1 không bỏ gì thêm, cốc 2 đổ nước ngập hạt khoảng 6-7 cm, cốc 3 lót xuống dưới những hạt đỗ một lớp bông ẩm, để ngăn đá tủ lạnh; cốc 4 lót bông ẩm để chỗ mát. Dự đoán kết quả thí nghiệm sau 3-4 ngày. Hạt đậu trong cốc nào sẽ nảy mầm? * A. Cốc 1 B. Cốc 2 C. Cốc 3 D. Cốc 4
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