If the output efficiency is lower than 10%,which means most part time of supply chain is the Non value-added time?
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The relationship between the customer service level and cost can not be described by a increasing curve.
A. 对
B. 错
设函数f(x)的定义域是[0,1]，那么函数f(x+1)的定义域是
A. [0,1]
B. [-1,0]
C. [1,2]
D. [0,2]
函数f(x)=3+2cosx的值域是
A. [2,4]
B. [1,5]
C. [-1,1]
D. [-2,2]
y=sin(1/x)在其定义域内是（）函数
A. 周期
B. 单调
C. 有界
D. 无界
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