The monopoly supply curve is the
A. same as the competitive market supply curve.
B. portion of marginal costs curve where marginal costs exceed the minimum value of average variable costs.
C. result of market power and production costs.
D. none of the above
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For a monopolist, changes in demand will lead to changes in
A. price with no change in output.
B. output with no change in price.
C. both price and quantity.
D. any of the above can be true.
在片剂中乙酰水杨酸含量的测定实验中,乙酰水杨酸和NaOH的化学计量关系是多少( )
A. 1:1
B. 1:2
C. 1:3
D. 1:4
在滴定分析中,一般指示剂颜色的突变来判断化学计量点的到达,在指示剂变色时停止滴定。这一点称为( )
A. 化学计量点
B. 滴定误差
C. 滴定终点
D. 滴定分析
滴定分析法对化学反应有严格的要求,因此下列说法中不正确的是( )
A. 反应有确定的计量关系
B. 反应速度必须足够快
C. 反应产物必须能与反应物分离
D. 有适当的指示剂可选择