全要素生产率是要素投入转化为产出的总体效率，决定着经济内涵型发展程度和潜在增长率高低，体现着经济发展的结构和质量。
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刘成选了另一条路。2025年，在多次反馈和协调下，夫妻俩为孩子拿到了《出生医学证明》。不过，证明上仅写有代孕母亲的名字，父亲栏则为“/”。
Venezuela's oil is also of poorer quality than its Saudi equivalent. Its sour, heavy crude is difficult to extract and refine, while its high sulphur content makes it corrosive to pipelines. A resurgence of Venezuela's industry could pose problems for Canada, which produces similarly viscous oil and exports much of it to the US, but analysts reckon the risk is minor.