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【简答题】
哪些颜色是无彩色系,哪些颜色属于有彩色系
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反馈参考答案：
举一反三
【单选题】In the long run a perfectly competitive firm operates ____ and a monopolistically competitive firm operates ____.
A.
at the efficient scale; with excess capacity
B.
at the efficient scale; at the efficient scale
C.
with excess capacity; with excess capacity
D.
with excess capacity; at the efficient scale
【单选题】Which of the following is not a characteristic of a competitive firm?
A.
There are many buyers and sellers in the market.
B.
The goods offered for sale are largely the same.
C.
Firms can freely enter or exit the market.
D.
All of the above are characteristics of a competitive market.
【单选题】某大型机械一次性大修理费用为8600元,耐用总台班960台班,大修理间隔台班240台班,则大修理费为()元/台班
A.
26.88
B.
25.64
C.
27.32
D.
35.83
【单选题】指出下列酸度适于佛尔哈德法的是
A.
pH 为 6.5 ~ 10.5
B.
pH 为 6.5 ~ 7.2
C.
酸度为 0.1mol·L-1 ~ 1.0 mol·L-1HNO3
D.
pH 为 4.0 ~ 6.0
【单选题】指出下列酸度适于佛尔哈德法的是 ( )
A.
pH为6.5 ~ 10.5
B.
pH为6.5 ~ 7.2
C.
酸度为0.1 mol·L-1 ~ 1.0 mol·L-1
D.
pH为4 ~ 6
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