A swing check valve is used in a pipeline to （）.

A . valve assembly B . standpipe manifold C . accumulator manifold D . choke manifold

A . Holding the valve open for a long period B . Increasing the starting air pressure used C . Opening the stating air valve quickly D . Reducing the starting air valve size

A . Steady B . Meet her C . Midships D . Stop engine

A . regulate the fluid flow in either direction B . restrict movement of hydraulic fluid in one direction, but allow free movement in the other direction C . allow free movement of hydraulic fluid in both directions D . allow a restricted fluid flow in one direction only

A . to inject cleaning additives when the bilges are extremely dirty B . when the main condenser becomes fouled, in order to provide additional cooling water circulation C . to connect the rose box to the independent bilge suction D . if the bilges become flooded and they can not be emptied by any other mea

A .  netpmon B .  netstat C .  nfsstat D .  vmstat

A . control the fluid flow through it B . prevent the pressure before it over the specified valve C . make the pressure after it steady D . control the direction of oil flow

A .  kdb  B .  snap -d  C .  dbx -vmcore  D .  od /dev/sysdumpdev

A . control the back pressure of return oil B . lock the oil lines under some conditions C . change the direction of oil flow D . act as relief valve

A . detect the temperature B . detect the pressure C . heat the refrigerant D . accelerate the refrigerant

A . cause loss of hydraulic oil from the system B . result in extreme damage to the pump C . cause damage to the pump ff not continually drained from the pump casing D . result in the system high side pressure to substantially drop off

A . direction of oil flow B . back pressure of return oil C . bypass of filter D . high pressure overflow

A . broaching B . pitchpoling C . rolling D . yawing

A .  The block change tracking feature must be enabled. B .  OMF must be configured on your database. C .  The database must be in ARCHIVELOG mode. D .  A USERID must be supplied.

A . proceeding B . overloading C . collision D . flooding

A . a test valve B . an inspection valve C . a stop valve D . a non-return valve

A . with the axis of the solenoid horizontal, sensing temperature of the box, and upstream of the thermal expansion valve B . upright, sensing temperature of the box, and upstream of the thermal expansion valve C . upright, sensing temperature of the box, and downstream of the thermal expansion valve D . upright, sensing heat of the tail coil, and upstream of the thermal expansion valve

A . assist in a quick cutoff of fuel injection B . allow oil backflow from the injector to the helix C . reduce fuel oil pressure between injection strokes D . meter the quantity of fuel delivered

A . At the designed operating temperature, the liquid refrigerant charge has changed to a vapor B . The liquid refrigerant tends to collect at the bellows or diaphragm and reduces the valve sensitivity C . The sensing bulb is empty of liquid refrigerant charge at the designed operating temperature D . The sensing bulb is never emptied of liquid refrigerant under normal operating conditio

A . deliver proper fuel quantity to the injection nozzle B . provide rapid fuel injection cutoff C . control fuel quantity entering the pump body D . control fuel pressure delivered to the combustion chamber

You are developing a Windows Comunication Foundation (WCF) service that is used to check the status of orders placed by customers.The following code segment is part of your service.(Line numbers are included for reference only.)01 [ServiceContract]02 public interface IStatus03 {04 [OperationContract]05 int GetOrderStatus(string orderNumber);06 }0708 class OrderService : IStatus09 {10 public int GetOrderStatus(string orderNumber)11 {12 ...13 }14 }1516 class Program17 {18 static void Main(string[] args)19 {202122 host.Open();23 ...24 }25 }You need to ensure that the service always listens at net.pipe://SupplyChainServer/Pipe.What should you do？（） A.<img src='https://img2.soutiyun.com/shangxueba/ask/64299001-64302000/64299436/44bc930e85f1f8ea6666713d65d11a7f.jpg' /> B.<img src='https://img2.soutiyun.com/shangxueba/ask/64299001-64302000/64299436/8ef87ec5f4d8c34db3e4decad746137d.jpg' /> C.<img src='https://img2.soutiyun.com/shangxueba/ask/64299001-64302000/64299436/67a300b885d0cf2bc4e5a825c6dfa608.jpg' /> D.<img src='https://img2.soutiyun.com/ask/uploadfile/2019-02-04/8e2bb53d0a32f397a2ffb84cf4121379.jpg' />

A:正确; B:错误

A．Forward DNS lookup B．Reverse DNS lookup C．RARP D．Nslookup