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【多选题】
描述语言L={ |n m 1}的文法为:( )A.
|a |b
B.
|a |b
C.
|A |ab
D.
|aAb|ε
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【判断题】The imposition of pollution-control regulations on domestic steel manufacturers leads to decreases in production costs and an improvement in the steel manufacturers' competitiveness.
A.
正确
B.
错误
【单选题】From a practical , how can you reduce production costs and at the same time minimize the risks involved?
A.
viewpoint
B.
inpoint
C.
standpoint
D.
strategy
【单选题】If the relationship between production costs and output is connected by the linear relationship Y=100X +40,000, What is 100?
A.
The number of units produced
B.
The total production costs
C.
The fixed production costs
D.
The variable cost per unit
【多选题】(2011全国联赛,51)陆生脊椎动物的听觉发达,中耳腔中的听小骨可将声波传到内耳。不同脊椎动物类群,其听小骨的数目不同,只具有一块听小骨的动物类群有:
A.
两栖类
B.
爬行类
C.
鸟类
D.
哺乳类
【简答题】对于点燃式内燃机,为什么存在最佳点火提前角?
【判断题】Production costs and manufacturing costs are included in the balance sheet if there is a balance at the end of the period as part of the fixed asset item, and therefore also belong to the balance shee...
A.
正确
B.
错误
【判断题】U.S. firms could not make a profit on the export of natural gas to Asia and Europe because of increasing production costs and transportation costs.
A.
正确
B.
错误
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