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【单选题】
随着互联网的快速发展，越来越多的公民通过网络参与政治生活。以网络为媒介的“政 府一民间”互动模式已成为我国政治文明的重要元素。“政府一民间”互动模式（ ）。 ①方便了公民直接管理国家事务 ②保障了人民群众对政府的质询权 ③拓宽了公民参与民主监督的渠道 ④有利于政府了解民意和汇集民智A.
①②
B.
②③
C.
①④
D.
③④
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举一反三
【单选题】In general, increasing marginal returns occur
A.
as output expands at low levels of production.
B.
through the entire range of production.
C.
as output expands at high levels of production.
D.
whenever the slope of the total product curve is positive.
【单选题】If, as the quantity produced increases, a production function first exhibits increasing marginal product and later diminishing marginal product, the corresponding marginal-cost curve will
A.
be flat (horizontal).
B.
slope upward.
C.
slope downward.
D.
be U-shaped.
【判断题】The "Law of Diminishing Marginal Returns" could also be termed the "Law of Increasing Marginal Costs."
A.
正确
B.
错误
【判断题】The "Law of Diminishing Marginal Returns" could also be termed the "Law of Increasing Marginal Costs."
A.
正确
B.
错误
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