49. What is the basis for higher wages according to the conventional

　　48 What is the logic underlying the author& 39;s viewpoint?　　A) The growth of workers& 39; paychecks ultimate

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　　47 What does the author think is a more effective measure for driving economic growth in the U S ?　　A) Ai

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　　46 Why does the formula of tax cuts remain popular though ineffective?　　A) Its critics& 39; voice has not

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　　45 In the long term, the potential for small farms in Africa to increase productivity is quite limited, esp

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　　44 Improvement in farm output per worker in Africa falls far short of that in Asia 　　答案&解析　　44 答案解

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