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【单选题】
The text shows that the author views economics as______.A.
a science useful for decision-making in both the long and the short term, as demonstrated by the example of game theory
B.
an entirely applicable science, despite common criticisms of short-sightedness
C.
a short sighted science, except for the concept of game theory
D.
the most practical and useful method by which to determine the proper solutions to long and short term questions
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举一反三
【单选题】有轨运输梭式矿车的轨道间距应为（），车体与轨道的交角可达（）.下列选择中正确的是（）
A.
2.0～2.5m；35°～40°
B.
1.5～2.0m；20°～35°
C.
2.0～2.5m；20°～35°
D.
1.5～2.0m；35°～40°