当前位置:考试网  > 试卷库  > 技能鉴定  > 科技类  > 通信计算机技能考试  >  对于光纤的固定连接有那些要求?
试题预览

对于光纤的固定连接有那些要求?

查看答案
收藏
纠错
正确答案:

(1)连接损耗要小,能满足设计要求,且应良好的一致性(2)连接损耗的稳定性要好(3)具有足够的机械强度和使用寿命(4)操作尽量简单(5)接头体积应小,易于放置、保护(6)费用低,材料易于加工或选购

答案解析:

暂无解析

你可能感兴趣的试题

高压消火栓的保护半径()m。

消防水泵并联的方式是为了增加

人体防静电措施是采取人体接地、工作地面导电化和安全操作等措施导除工作人员身上所带的静电。

没收是一种剥夺财产权的行政处罚。

在高楼遇到危险时,不得向楼下抛掷任何物体,以免砸伤路人。

热门试题 更多>
试题分类: 网络管理员
练习次数:0次
试题分类: Web程序设计
练习次数:0次
试题分类: Python语言程序设计
练习次数:0次
试题分类: 土建
练习次数:0次
Thefoodweeatseemstohaveprofoundeffectsonourhealth.Althoughsciencehasmadeenormousstepsinmakingfoodmorefittoeat,ithas,atthesametime,mademanyfoodsunfittoeat.Someresearchhasshownthatperhapseightypercentofcancerisrelatedtothedietaswell,especiallycancerthecolon.Differentculturesaremorepronetocontractcertainillnessesbecauseofthefoodthatischaracteristicinthesecultures.Thatfoodrelatedtollnessisnotanewdiscovery.In1945,governmentresearchersrealizedthatitratesandnitrites,commonlyusedtopreservecolorinmeats,andotherfooddditives,causedcancer.Yet,thesecarcinogenicadditivesremaininourfood,nditbecomesmoredifficultallthetimetoknowwhichthingsonthepackginglabelsofprocessedfoodarehelpfulorharmful.Theadditiveswhichweeatarenotallsodirect.Farmersoftengivepenicillintobeefandpoultry,andbecauseofthis,penicillinhasbeenfoundinthemilkoftreatedcows.Sometimessimilardrugsareadministeredtoanimalsnotformedicinalpurposes,butforfinancialreasons.Thefarmersaresimplytryingtofattentheanimalsinordertoobtainahigherpriceonthemarket.AlthoughtheFoodandDrugAdministration(FDA)hastriedrepeatedlytocontroltheseprocedures,thepracticescontinue. 48.Whatisthemaintopicofthepassage? A.Foodandourhealth BFoodandadditives C.Foodandcancer DFoodandculture 49AllofthefollowingstatementsaretrueEXCEPT_______. AFortypercentofcanceriscausedbyproblemsrelatedtofood. BResearchershaveknownaboutthepotentialdangeroffoodadditivesformanyyears C.Weeatsomeofthefoodadditivesdirectlyandsomeindirectly DDrugsarealwaysgiventoanimalsformedicinalpurposes 50.Whydofarmersgivedrugstotheiranimals? A.tospeedupthegrowthofanimals BTomaketheanimalsfatter Ctomaketheanimals’meatfittoeat DTomaketheanimals’meatrichinnutrients 51.Itcanbeinferredfromthepassagethat_________. Ascientisthavemadeallthefoodfittoeat Bonlyinrecentyearshavepeoplefoundthatthefoodisrelatedtoone’sillness Callkindsofcancerarerelatedtothediet Dsomeadditivesareharmfultoourhealth 52.Theword“this”inthesecondsentenceofparagraph2mostprobablyrefersto__________. Afarmer Bpenicillin Cbeefandpoultry Dthefactthatfarmersoftengivepenicillintoabeef
试题分类: 英语B级
练习次数:0次
试题分类: 网络管理员
练习次数:0次
试题分类: 系统分析师
练习次数:1次
扫一扫,手机做题