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 di

题目

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

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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 popular B.alcohol is similar to medicine C.alcohol is a chemical D.alcohol is used to relieve stress

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第2题

Of the two types of sentence stress, sense stress shows contrast, while logical stress shows meaning.（）A对B错

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第3题

Of the two types of sentence stress, sense stress shows contrast, while logical stress shows meaning.（）

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第4题

单选题Two main processes that determine oil prices are ______.A media accounts and oil marketsB economic fundamentals and irrational fears or the actions of shadowy governmentsC consumers’ fears and suppliers’ political decisionsD the forces of supply and demand and constraints on those forces created by political risk and cartel behavior

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第5题

单选题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

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第6题

单选题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

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第7题

单选题1）#include2）usingnamespacestd；3）intmain（）4）{5）inta，b，result；6）cout>a>>b；8）result=3*a-2*b+1；9）cout<<"resultis"< A please input two numbers：/nB please input two numbers：C cout<<”please input two numbers：/n”D ”please input two numbers：/n”

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Tensile stress is a result of two forces acting in ______.A.opposite directions on the sam

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