How are these parts of our body held together? They are held together by______. What is the function of bone marrow? Its funct

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问题 How are these parts of our body held together?
They are held together by______.

What is the function of bone marrow?
Its function is to______.

选项

答案make the white and red cells of blood

解析从第二段第五句"It makes the red and white cells of blood"可知，"制造血液需要的红血球和白血球"是骨髓的基本功能。

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大学英语三级A级

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