Tensile stress is a result of two forces acting in ______.A.opposite directions on the same line，tending to pull the material apartB.opposite directions on the same line，tending to compress the objectC.opposite directions along parallel linesD.the same direction along parallel lines
Tensile stress is a result of two forces acting in ______.
A.opposite directions on the same line，tending to pull the material apart
B.opposite directions on the same line，tending to compress the object
C.opposite directions along parallel lines
D.the same direction along parallel lines
相关考题：
Which of the following is true according to the first two paragraphs?A．Women are biologically more vulnerable to stress.B．Women are still suffering much stress caused by men.C．Women are more experienced than men in coping with stress.D．Men and women show different inclinations when faced with stress.
Which two forms of DSL connectivity provide the same bandwidth in both directions?() A.ADSLB.HDSLC.SDSLD.RADSL
Sometimes it is desirable to connect a member both by riveting and welding. Which statement is TRUE concerning this procedure?A.Tearing through the member is more likely in this type connectionB.The weld may be broken by the stresses caused by rivetingC.The weld increases the tensile stress on the rivet headsD.The welding must be completed before the riveting commences
With no environmental forces acting on the vessel，the center of gravity of an inclined vessel is vertically aligned with the ______．A.longitudinal centerlineB.center of flotationC.original vertical centerlineD.metacenter
One function of a bulwark is to ______．A.Help keep the deck dryB.Prevent stress concentrations on the stringer plateC.Protect against twisting forces exerted on the frame of the vesselD.Reinforce the side stringers
Your vessel has a midships engine room and the cargo is concentrated in the end holds．The vessel is ______．A.sagging with tensile stress on main deckB.sagging with compressive stress on main deckC.hogging with tensile stress on main deckD.hogging with compressive stress on main deck
Stress makes a person want to stop whatever they are doing,try to relax,and become calm again．Too much stress results in physical,emotional,and mental health problems.There are numerous physical effects of stress．Stress can affect the heart．It can increase the pulse rate,make the heart miss beats,and can cause high blood pressure．Stress can affect the respiratory system．It can lead to asthma．It can cause a person to breathe too fast,resulting in a loss of important carbon dioxide．Stress can affect the stomach．It can cause stomach aches and problems digesting food．These are only a few examples of the wide range of illnesses and symptoms resulting from stress.Emotions are also easily affected by stress．People suffering from stress often feel anxious．They may have panic attacks．They may feel tired all the time．When people are under stress,they often overreact to little problems．For example,a normally gentle parent under a lot of stress at work may yell at a child for dropping a glass of juice．Stress can make people angry,moody,or nervous.Long-term stress can lead to a variety of serious mental illnesses．Depression,an extreme feeling of sadness and hopelessness,can be the result of continued and increasing stress．Alcoholism and other addictions often develop as a result of overuse of alcohol or drugs to try to relieve stress．Eating disorders,such as anorexia,are sometimes caused by stress and are often made worse by stress．If stress is allowed to continue,then one's mental health is put at risk.It is obvious that stress is a serious problem．It attacks the body．So,reduce stress:stop the world and rest for a while.Stress can affect the respiratory system by__.A.decreasing the pulse rateB.a loss of carbon dioxideC.causing breathing problemsD.causing asthma
Stress makes a person want to stop whatever they are doing,try to relax,and become calm again．Too much stress results in physical,emotional,and mental health problems.There are numerous physical effects of stress．Stress can affect the heart．It can increase the pulse rate,make the heart miss beats,and can cause high blood pressure．Stress can affect the respiratory system．It can lead to asthma．It can cause a person to breathe too fast,resulting in a loss of important carbon dioxide．Stress can affect the stomach．It can cause stomach aches and problems digesting food．These are only a few examples of the wide range of illnesses and symptoms resulting from stress.Emotions are also easily affected by stress．People suffering from stress often feel anxious．They may have panic attacks．They may feel tired all the time．When people are under stress,they often overreact to little problems．For example,a normally gentle parent under a lot of stress at work may yell at a child for dropping a glass of juice．Stress can make people angry,moody,or nervous.Long-term stress can lead to a variety of serious mental illnesses．Depression,an extreme feeling of sadness and hopelessness,can be the result of continued and increasing stress．Alcoholism and other addictions often develop as a result of overuse of alcohol or drugs to try to relieve stress．Eating disorders,such as anorexia,are sometimes caused by stress and are often made worse by stress．If stress is allowed to continue,then one's mental health is put at risk.It is obvious that stress is a serious problem．It attacks the body．So,reduce stress:stop the world and rest for a while.Choose the best answer to explain how alcoholism is caused by stress.A.alcohol is popularB.alcohol is similar to medicineC.alcohol is a chemicalD.alcohol is used to relieve stress
Of the two types of sentence stress, sense stress shows contrast, while logical stress shows meaning.（）A对B错
Of the two types of sentence stress, sense stress shows contrast, while logical stress shows meaning.（）
单选题Two main processes that determine oil prices are ______.Amedia accounts and oil marketsBeconomic fundamentals and irrational fears or the actions of shadowy governmentsCconsumers’ fears and suppliers’ political decisionsDthe forces of supply and demand and constraints on those forces created by political risk and cartel behavior
单选题Your vessel has a midships engine room and the cargo is concentrated in the end holds．The vessel is（）.Asagging with tensile stress on main deckBsagging with compressive stress on main deckChogging with tensile stress on main deckDhogging with compressive stress on main deck
单选题Sometimes it is desirable to connect a member both by riveting and welding. Which statement is TRUE concerning this procedure? （）ATearing through the member is more likely in this type connectionBThe weld may be broken by the stresses caused by rivetingCThe weld increases the tensile stress on the rivet headsDThe welding must be completed before the riveting commences
单选题1）#include 2）usingnamespacestd； 3）intmain（） 4）{ 5）inta，b，result； 6）coutab； 8）result=3*a-2*b+1； 9）cout"resultis"Aplease input two numbers：/nBplease input two numbers：Ccout”please input two numbers：/n”D”please input two numbers：/n”
单选题Tensile stress is a result of two forces acting in（）.Aopposite directions on the same line，tending to pull the material apartBopposite directions on the same line，tending to compress the objectCopposite directions along parallel linesDthe same direction along parallel lines
单选题Who has been acting CEO for the last two months?AGerald WallaceBBen HolmesCClive WarrenDBella Haskins
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单选题The main function of tie rods in the construction of large, low speed diesel engines is to（）.Astiffen the bedplate in way of the main bearings to increase the engines longitudinal strengthBaccept most of the tensile loading that results from the firing forces developed during operationCmount the engine frame securely to the hull to prevent shaft coupling misalignmentDconnect the crosshead solidly to the piston rod
单选题The internal force of a material, which tends to resist deformation when subjected to external forces, is known as （）.AstressBstrainCshear strengthDultimate tensile strength
单选题Stability is determined principally by the location of the point of application of two forces: the downward-acting gravity force and the（）.Aupward-acting weight forceBdownward-acting weight forceCupward-acting buoyant forceDenvironmental force
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判断题Of the two types of sentence stress, sense stress shows contrast, while logical stress shows meaning.（）A对B错
单选题The result of two forces acting in opposite directions and along parallel lines，is an example of what type of stress?（）ATensileBCompressionCShearDStrain
单选题In a single acting, two-stroke/cycle, diesel generator engine, the power impulse in an individual cylinder occurs （）Aonce every crankshaft revolutionBonce every two crankshaft revolutionsConce every piston strokeDtwice every piston stoke
单选题One function of a bulwark is to（）.Ahelp keep the deck dryBprevent stress concentrations on the stringer plateCprotect against twisting forces exerted on the frame of the vesselDreinforce the side stringers
单选题The centre of lateral resistance is（）.Athe center of the hydrodynamic forces acting on the underwater hull to resist the effect of the windBthe point of influence of wind on the shipCthe pivot pointDthe point on the ship's above-water structure upon which the whole force of the wind can be considered an act
多选题Which two forms of DSL connectivity provide the same bandwidth in both directions？（）AADSLBHDSLCSDSLDRADSL