题干
阅读材料，然后从各小题所给的四个选项中选出一个最佳答案。
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Found: Is this your book? Please call John at 495-3456. |
Lost: My school ID card. My name is Mike. Please call 487-2349 |
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Found: Is that your black schoolbag? Please call Mary. Phone#476-5939 |
Found: A set of keys. Please call Lily at 498-2456 |
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Lost: My pencil case. Blue and white, call Tom at 456-8700. |
Found: A cat. Black and White. At the school gate. Call: 412-9856. |
贴等一系列政策，使广大农村发生了翻天覆地的变化。国家采取的一系列惠农政策的哲学依据是