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【单选题】
实践是人们改造客观世界的物质活动,下列不属于实践活动的是A.
农民播种小麦
B.
学生学习科学文化知识
C.
警察侦破案件
D.
科学家进行物理实验
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
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