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【单选题】
In theory, Ecuador could be a major exporter of shrimp. In actuality, it is not. The explanation is that 80 percent of the country's rich estuaries are owned by the government. This hurts Ecuador's shrimp production, because the government does not have the flexibility necessary for efficient shrimp farming that private industry possesses. The answer to which of the following questions would be most relevant to evaluating the adequacy of the explanation given above?A.
Who owns the 20 percent of estuaries that are not owned by the government?
B.
What percentage of Ecuador's production of shrimp is consumed domestically?
C.
Has the government stated any plans to sell any of its estuaries to private industry, provided that the price is sufficient?
D.
Is Peru, Ecuador's neighbor to the south, actually better suited for commercial shrimp farming than Ecuador, which is a substantially smaller country?
E.
How does Ecuador's shrimp production on government-owned estuaries compare to that on comparable land owned by private industry?
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【单选题】滚动轴承的额定静载荷是指_________。
A.
使滚动体和滚道不致发生破坏的最大负荷
B.
使滚道表面塑性变形为滚动体直径万分之一时的负荷
C.
轴承在应力最大的滚动体与滚道接触处滚动体与滚道总永久变形量为滚动体直径 万分之一时的负荷
D.
使 90% 的轴承滚道与滚动体变形量小于滚动体直径万分之一时的负荷
【单选题】()类信息是有极高使用价值的专用信息,如重要的市场走向分析、网络畅销商品的情况调查、新产品新技术信息,专利技术以及其它独特的专门性信息等,是信息库中成本费用最高的一类信息。
A.
标准收费信息
B.
优质优价信息
C.
低收费信息
D.
免费信息
【单选题】滚动轴承的额定静载荷是指使 _________ 的载荷。
A.
滚动体和滚道不致破坏时
B.
滚道表面永久变形为滚动体直径万分之一时
C.
滚道与受载最大的滚动体接触中心处引起规定接触应力时
D.
90 %的轴承滚道与滚动体塑性变形之和等于滚动体直径万分之一时
【单选题】滚动轴承的额定静载荷是指使 _________ 的载荷。
A.
滚动体和滚道不致破坏时
B.
滚道表面永久变形为滚动体直径万分之一时
C.
滚道与受载最大的滚动体接触中心处引起规定接触应力时
D.
90 ％的轴承滚道与滚动体塑性变形之和等于滚动体直径万分之一时
【简答题】12选10 Working Mothers Carefully conducted researches that have followed the children of working mothers have not been able to show any long - term problems, compared with children whose mothers stayed...
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