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问题
选择题
My sister is really smart.
is very good at schoolwork.
A. He
B. His
C. She
D. Her
答案
答案:
C
解答题
钙是人体重要的组成元素,所以每人每天都要吃钙片______.
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问答题 简答题
申请麻醉药品和精神药品定点批发企业必须具备哪些条件?
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