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【单选题】
若在 内, 的一阶导数 ,导数 ,则函数 在此区间内( )A.
单调增,曲线下凸（上凹）;
B.
单调减,曲线下凸;
C.
单调减,曲线上凸（向下凹）;
D.
单调增,曲线上凸.
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皮皮学刷刷变学霸
举一反三
【单选题】由于混菜和水果不断地放发出水分和二氧化碳等气体,为了保持合适的气体成分,应进行换气;果类冷艙或冷集装箱的换气次数为每昼夜_______次
A.
1-4
B.
1-5
C.
2-4
D.
2-5
【单选题】Refer to Exhibit 6-4. With reference to Graph B, at a price of $5, total revenue equals:
A.
$200.
B.
$300.
C.
$250.
D.
$150.
【单选题】Refer to Exhibit 4-5 . A change from Point A to Point D represents a(n):
A.
increase in supply
B.
decrease in supply.
C.
increase in quantity supplied
D.
decrease in quantity supplied.
【单选题】Refer to Exhibit 4-5 . A change from Point A to Point C represents a(n):
A.
increase in supply.
B.
decrease in supply
C.
increase in quantity supplied.
D.
decrease in quantity supplied.
【单选题】Refer to Exhibit 4-5 . A change from Point A to Point E represents a(n):
A.
increase in supply.
B.
decrease in supply
C.
increase in quantity supplied.
D.
decrease in quantity supplied.
【单选题】Refer to Exhibit 6-4. With reference to Graph A, at a price of $5, total revenue equals:
A.
$200.
B.
$400.
C.
$500.
D.
$1,000.
【单选题】Refer to Exhibit 13-8. What price should be charged during peak periods to achieve efficiency?
A.
3 cents
B.
4 cents
C.
5 cents
D.
0 cents
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