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《INSPEC》数据库中“Controlled Index”的使用对检索效果的改善有什么作用？
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更多 “《INSPEC》数据库中“Controlled Index”的使用对检索效果的改善有什么作用？” 相关考题
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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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The frequency of an AC generator is controlled by theA.rheostatB.governorC.exciterD.capacitor
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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
考题
There are some speaking activities. Which of the following mainly focuses on the form and accuracy?
A．Controlled activities.
B．Semi-controlled activities.
C．Communicative activities.
D．Problem-solving activities.
考题
The project management plan defines how the project is executed,monitored and controlled,and closed.It is progressively elaborated by updates,and controlled and approved through the perform integrated（ ）process.A.Cost control
B.Schedule control
C.Change control
D.Risk control
考题
单选题The author states that the will and the passions of the people _____.A
can be effectively controlled by the people themselvesB
should determine government policiesC
can be controlled only by a power that exists apart from the people and is not subject to that will and those passionsD
cannot be controlled
考题
单选题The frequency of an AC generator is controlled by the （）A
rheostatB
governorC
exciterD
capacitor
考题
单选题The mechanical exhaust valve operation system is replaced by（）in an electronic controlled ME engine.A
a system with a Hydraulic Power Supply (HPS) unitB
a system with roller guides for exhaust valvesC
a system with an electronically controlled Alpha LubricatorD
a system directly powered by electric motor
考题
单选题In the starting system, the automatic valve is controlled by（）, and the cylinder start valves are controlled by（）A
pilot air；pilot airB
handle；solenoidC
handle；pilot air coming through the distributorD
solenoid；pilot air coming through the distributor
考题
单选题If remote-controlled cars are more expensive than mechanical cars, and radio-controlled cars are more expensive than remote-controlled cars, which of the following statements must be true?A
Mechanical cars are the most expensive.B
Radio-controlled cars are the most expensive.C
Radio-controlled cars are cheaper than remote-controlled cars.D
Mechanical cars are more expensive than remote-controlled cars.
考题
单选题A common rail engine has only one or two high pressure pumps in operation at the same（）time, and the injection into each cylinder.A
can’t be controlled very preciselyB
can’t be controlled as flexibly as the separate pump systemC
can be controlled as flexibly as the separate pump systemD
can be controlled more precisely and flexibly
考题
单选题The air distributor is conventionally driven by（） and distributes into each cylinder by（） certain sequence.A
camshaft；fresh airB
camshaft；starting airC
electronic motor which is controlled by a computer；fresh airD
electronic motor which is controlled by a computer；starting air
考题
问答题《SCI》、《EI》、《CA》、《INSPEC》 都属于文摘数据库，为什么我们能在其中直接看到一些文献的全文？
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