如果焊件在焊接过程中产生的压应力大于材料的屈服点,则焊后不会产生焊接残余应力和残余变形

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2、错误
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Shonasaysthatinherquestionnaireheraimwas____.

A、togetawiderangeofdata
B、tolimitpeople'sresponses
C、toguidepeoplethroughinterviews

Ifyousticktoyourcountofferwithoutanycompromisewemaynotabletomakeadeal.

Weregretthatweareunabletomeetyourrequirementforthetimebeingasordershavebeenfullybooked.

Tobeginwith,"muzak"(音乐广播网)wasintendedsimplytocreateasoothing(安慰)atmosphere.Recently,however,it'secomebigbusiness—thanksinparttorecentresearch.Dr.RonaldMilliman,anAmericanmarketingexpert,hasshownthatmusiccanboostsalesorincreasefactoryroductionbyasmuchasathird.But,ithastobelightmusic.Afastonehasnoeffectatallonsales.Slowmusiccanincreasereceiptsby38%.Thisisprobablybecauseshoppersslowdownandhavemoreopportunitytospotitemstheyliketobuy.Yet,slowmusicisn'talwaysanswer.Dr.Millimanfound,forexample,thatinrestaurantsslowmusicmeantcustomerstooklongertoeattheirmeals,whichreducedoverallsales.Sorestaurantsownersmightbewelladvisedtoplayup-tempomusictokeepthecustomersmoving—unlessofcourse,theresultingindigestionleadstocomplaints!

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A.itcanhaveapowerfuleffectonthosewhohearit

B.itcanhelptocreateasoothingatmosphere

C.itcanboostsalesorincreasefactoryproductionerywhere

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A.lightmusicthatcustomersenjoymostB.fastmusicthatmakespeoplemovefast

C.slowmusicthatcanmakecustomersenjoytheirmeals

D.themusicyouarelisteningtowhileyouaredoingomething

3.Restaurantownerscomplainaboutbackgroundmusicbecause______.

A.itresultsinindigestion

B.itincreasestheirsales

C.itkeepscustomersmoving

D.itdecreasestheirsales

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D.classicalmusic

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