某水闸加固改造工程土建标共有甲、乙、丙、丁四家潜在投标人购买了资格预审文件，经审查乙、丙、丁三个投标人通过了资格预审;在规定时间内乙向招标人书面提出了在阅读招标文件和现场踏勘中的疑问，招标人确认后应在规定时间内将招标文件的答疑以书面形式发给（）。

钢丝绳的安全系数是（）。

Directions:

Inthissectionyouwillheararecordedshortpassage.Thepassageisprintedinthetestpaper,butwithsomewordsorphrasesmissing.Thepassagewillbereadtwotimes.YouarerequiredtoputthemissingwordsorphrasesontheAnswerSheetinorderofthenumberedblanksaccordingtowhatyouhear.Ithinkwe'llmbeginnow.FirstI'dliketowelcomeyouallandthankyouforyourcoming,especiallyatsuchshortnotice.Iknowyouareallverybusyandit'sdifficulttotaketimeawayfromyour______formeetings.Asyoucanseeontheagenda,todaywewillfocusontheupcoming______.Firstwe'lldiscussthegroupsthatwillbecominginfromGermany.Afterthat,we'lldiscusstheNorthAmericanTours,______bytheAsiantours.Iftime______,wewillalsodiscusstheAustraliantourswhicharebookedforearlySeptember.Finally,I'mgoingtorequestsomefeedbackfromallofyou______lastyear'stoursandwhereyouthinkwecanimprove.

水利工程档案保管期限分为()。

施工导流标准不包括（）。