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图一1图一中是美国著名城市，拥有硅谷之称的城市是（
图二
）________（2）图二中C所示的农业带是：_________请写出它的两点优势条件：_____________________________________________________________________________（3）美国地区生产的特点____________________
（3）_______171___________2_________
f__________________________________________________________________________________________________3______________________181__________2____________3________________________________________________
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