锯割时压力的大小,应随材料的性质而变化,锯软材料时压力可大些,锯硬材料时压力要小些,工件快锯断时压力要减小。

1、正确
2、错误
查看答案
正确答案:

错误

答案解析:

暂无解析

上一题
你可能感兴趣的试题

PartVWriting

Directions:InthispartyouarerequiredtowriteanessayaboutSavingEnergiesandResources.Youshouldwriteatleast120wordsandbaseyourcompositionontheoutline(giveninChinese)below:

1、随着社会的发展,厉行节约越来越重要;

2、生活中许多方面都可以节约;

3、每个人都应该养成节约的好习惯。

Thevisitorsplannedto________________(花最少的时间游览公园以外的地方).

妊娠妇女睡眠时应多取

A、平卧位
B、半卧位
C、左侧卧位
D、右侧卧室位
E、俯卧位

PartIIICloze

Directions:Therearetwentyblanksinthefollowingpassage.Foreachblanktherearefourchoices.ChoosetheonethatbestfitsintothepassageandthenmarksyouranswerontheAnswerSheet.

Beforethe20thcenturythehorseprovideddaytodaytransportationintheUnitedStates.Trainswereusedonlyforlong-distancetransportation.

Todaythecaristhemostpopular61oftransportationinalloftheUnitedStates.Ithascompletely62thehorseasameansofeverydaytransportation.Americansusetheircarsfor6390percentofallpersonal64.

MostAmericansareableto65cars.

Theaveragepriceofa66madecarwas1050in1950,1740in1960andupto1750671975.DuringthisperiodAmericancarmanufacturerssetabout68theirproductsandworkefficiency.

Asaresult,theyearlyincomeofthe69familyincreasedfrom1950to197570thanthepriceofcars.Forthisreason71anewcartakesasmaller72ofafamily’stotalearningstoday.

In195173ittook8.1monthsofanaveragefamily’s74tobuyanewcar.In1962anewcar758.3ofafamily’sannualearnings.By1975itonlytook4.7576income.Inaddition,the1975carsweretechnically77tomodelsfrompreviousyears.

The78oftheautomobileextendsthroughouttheeconomy79thecarissoimportanttoAmericans.Americansspendmoremoneyto80theircarsrunningthanonanyotheritem.

61.A.kindsB.meansC.meanD.types

62.A.deniedB.reproducedC.replacedD.ridiculed

63.A.hardlyB.nearlyC.certainlyD.somehow

64.A.tripB.worksC.businessD.travel

65.A.buyB.sellC.raceD.see

66.A.quicklyB.regularlyC.rapidlyD.recently

67.A.onB.inC.behindD.about

68.A.raisingB.makingC.reducingD.improving

69.A.unusualB.interestedC.averageD.biggest

70.A.slowestB.equalC.fasterD.lessthan

71.A.bringingB.obtainC.boughtD.purchasing

72.A.partB.halfC.numberD.side

73.A.clearlyB.proportionallyC.percentageD.suddenly

74.A.incomeB.workC.plansD.debts

75.A.usedB.spendC.costD.needed

76.A.months’B.dollarsC.familyD.year

77.A.famousB.superiorC.fastestD.purchasing

78.A.runningB.noticeC.influenceD.discussion

79.A.thenB.asC.soD.which

80.A.startB.leaveC.keepD.repair

翻译训练:普通话与方言

中国土地广阔,人口众多。尽管全国都讲汉语,但是不同地区的人说汉语的方式不同,这被称为方言。方言一般被称为地方话,是汉语在不同地区的分支,只在特定地区使用。汉语方言非常复杂。它们有以下三方面不同:发音、词汇和语法。发音的区别最为显著。2000多年前,中国人发现社交时应该使用统一的语言。和方言相比,普通话(mandarin)能被所有人理解。普通话有利于不同种族、地区人民之间的信息传递和文化交流。

热门试题 更多>
相关题库更多>
送电线路工
变电检修工
继电保护工
水电自动装置检修工
变电二次安装工
变电一次安装工
配电线路工
试卷库
试题库