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【单选题】

In its simplest form the pressure reducing valve is opened or closed by () which is balanced by the downstream pressure acting on a diaphragm.

A、adjusting a nut

B、a pre-tensioned spring

C、any spring

D、upstream pressure

更多“In its simplest form the pressure reducing valve is opened or closed by () which is balanced by the downstream pressure acting on a diaphragm.”相关的问题
第1题

A、It is an unrestricted procedure.  B、It is valid in Enter Query mode.  C、It invokes a formin a modal window.  D、It can only invoke a formin Query Only mode.  E、It enables you to start a new database session.  F、It enables free navigation between all opened form sin an application.  

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第3题

A、Starting the disengaged windlass at high speed  B、Rigging a bull rope to pull it out  C、To grease the hawsepipe  D、To pry it loose with a short piece of pipe  

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第7题

A、The data entered into the called form is logically independent of the data entered in the calling form.   B、The called form requires different privileges than the calling form.   C、The called form must execute as a different user than the calling form.   D、The calling form must be able to query data in the called form before it is saved.  

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第8题

A、Add a CompareValidator control to the Web Form. Set its ControlToValidate property to txtDate. Set its Type property to Date. Set its Operator property to DataTypeCheck.  B、Add a RangeValidator control to the Web Form. Set its ControlToValidate property to txtDate. Set its Type property to Date. Set its MinimumValue property to 01/01/1900 and its MaximumValue to the current date.  C、Add a CustomValidator control to the Web Form. Set its ControlToValidate property to txtDate. Write a function in the partial class that verifies the values as dates and returns a Boolean variable. Set the CustomValidators ClientValidationFunction to the name of your function.  D、Add a RegularExpressionValidator control to the Web Form. Set its ControlToValidate property to txtDate. Setthe ValidationExpression property to ensure that the users input follows the format of nn-nn-nnnn, where n represents a number from 0 through 9.  

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第9题

A、Add a CompareValidator control to the Web Form. Set its ControlToValidate property to txtDate. Set its Type property to Date. Set its Operator property to DataTypeCheck.  B、Add a RangeValidator control to the Web Form. Set its ControlToValidate property to txtDate. Set its Type property to Date. Set its MinimumValue property to 01/01/1900 and its MaximumValue to the current date.  C、Add a CustomValidator control to the Web Form. Set its ControlToValidate property to txtDate. Write a function in the partial class that verifies the values as dates and returns a Boolean variable. Set the CustomValidators ClientValidationFunction to the name of your function.  D、Add a RegularExpressionValidator control to the Web Form. Set its ControlToValidate property to txtDate. Set the ValidationExpression property to ensure that the users input follows the format of nn-nn-nnnn, where n represents a number from 0 through 9.  

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