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1.
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我国养鹅历史悠久，品种资源丰富，但育种水平比较落后，没有形成科学的良种繁育体系。
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2.
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逆向思维与正向思维协同并用，事后分析转化为事先分析，构成科学技术研究活动和科技发展的全过程，两者不可偏废。
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3.
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我要把人生变成科学的梦，然后再把梦变成现实。
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4.
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观点和方法分析教材，准确无误地掌握教材的科学性，深刻地揭示教材的思想教育内容，使学生具有真才实学，并帮助他们形成科学的世界观。
※ "成科"造句
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怎祝网汉语词典查词提供。