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huylatentui.2001
2 năm trước
Lấy một xương đùi ếch trưởng thành ngâm trong cốc đựng dung dịch axit clohiđric 10% trong 10 – 15 phút. Theo lí thuyết, dự đoán nào sau đây đúng ? A:Axit clohiđric tác dụng với xương làm xương tan hoàn toàn trong dung dịch axit. B: Axit clohiđric tác dụng với phần cốt giao trong xương làm cho xương giòn và cứng hơn. C: Axit clohiđric tác dụng với chất khoáng trong xương làm xương mềm ra có thể uốn cong được. D: Axit clohiđric tác dụng với các chất khoáng trong xương làm cho xương dãn dài ra. Giải Thích
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