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【单选题】
单位反馈系统的开环传递函数为 10/[s(s+1)],求输入为5+t时的稳态误差A.
5
B.
0
C.
10
D.
0.1
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参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】收入弹性(income elasticity)
【简答题】期权弹性(option elasticity)
【简答题】弹性论(Elasticity Approach)
【单选题】If the short run elasticity of supply for a product is 0.8, in the long run elasticity, supply:
A.
Is inelastic.
B.
Is unit elastic.
C.
Is inelastic.
D.
Any of the above could be true of the product’s long run elasticity of supply.
【单选题】The difference between slope and elasticity is that_________.
A.
slope is a ratio of two percentage changes, and elasticity is a ratio of two changes
B.
slope is a ratio of two changes, and elasticity is a ratio of two percentage changes
C.
none of the above; there is no difference between slope and elasticity
D.
slope measures changes in quantity demanded more accurately than elasticity
【简答题】需求交叉弹性(cross elasticity of demand)
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