题目

济南军区总医院利用干细胞成功修复了受损神经细胞。其原理主要是依据 A.细胞的分化          B.细胞的衰老       C.细胞的分裂        D.细胞的生长 答案:AThe wounded soldiers were caught and ________ the enemy. [     ]A.at the price of  B.at the sight ofC.at the mercy of  D.at the bottom of
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