题目

实践没有止境,创新也没有止境。我们要突破前人,后人也必然会突破我们。这是社会前进的必然规律。这说明人类的实践活动具有 A.历史性       B.社会性           C.物质性         D.能动性 答案:AEverybody showed great respect to the old doctor, who devoted everything he had to _____ the poor conditions of the local hospital.    A. improving    B. improve      C. to improve     D. being improved
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