400-600-1123
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答案：
E
更强的专利
法被需要用来保护发明免遭侵权。有了这个保护，制造商将被鼓励投资在新产品和新技术上。这样的投资经常导致制造商生产力上升。
逻辑链：Law---invest---productivity（专利法—生产力）
结论题
A 更强的专利法势必对金融机构和制造商都有利 题干里没提金融机构，扩大了逻辑范畴，无法得出这个结论，无关
B 制造业生产力提升可能伴随着创造更多制造业工作 （productivity---job的关系，无关）
C 除非有更强的专利法，否则制造商将减少新产品和技术的投资（取非，风险选项；专利法-增加投资 不能推出 !专利法--!增加投资）
D 现存专利法的弱点是经济衰退的原因 (recession，显然无关)
E 更强的专利法将刺激制造商生产力提升 正确，符合我们的预期 
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