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被控量 (controlled variable )
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The overall transfer function is the ratio of the transform. of the controlled variable to the transform. of ( ).
A.the controlled variableB.the reference inputC.the feedbackD.the output variable
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A feedback is an input ____A.which governs the state of a variableB.which provides a visual and audible alarmC.which indicates values of controlled variablesD.which measures the state of the controlled variable
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The order of name resolution can be controlled. The default is: 1.DNS/BIND 2.NIS 3./etc/hosts To change the order of the above name resolutions, which of the following should be used?()A、nslookupB、hostnameC、/etc/host.equivD、environment variable NSORDER
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在定值控制系统中,其控制作用是()A、给定值随工况变化,被控量也跟着变化B、给定值不变,被控量也始终不变C、被控量能尽快地恢复到给定值附近D、定值在一定范围变动,被控量在较小范围内变化
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单选题The order of name resolution can be controlled. The default is: 1.DNS/BIND 2.NIS 3./etc/hosts To change the order of the above name resolutions, which of the following should be used?()A
nslookupB
hostnameC
/etc/host.equivD
environment variable NSORDER
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单选题The steady state difference between the control point and the value of the controlled variable, corresponding with the set point, is known as ()A
dead bandB
control pointC
deviationD
offset
考题
单选题The value of the controlled variable, which under any fixed set of conditions the automatic controller operates to maintain, is known as ()A
set pointB
control pointC
deviationD
offset
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单选题The delivery rate of a variable stroke axial piston hydraulic pump is controlled by varying the position of the ().A
slide blockB
tilting boxC
pintleD
reaction ring
考题
单选题A feedback is an input()A
which governs the state of a variableB
which provides a visual and audible alarmC
which indicates values of controlled variablesD
which measures the state of the controlled variable
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