The nine samples of the soil sediments which took in the summer holiday , and we should put the samples that the metage is about 75 grams into the plastic bags , and then make the first samples , and numbered for it from to 在暑假所取得的九个土壤沉积物的样品中，称量75克左右的样品装入塑料袋中制成初样，并将初样进行编号至。
2.
Shotcrete - rock bolt support and concrete lining are important parts of timbering structures in modern tunnel construction , and there are also essentials for natm . the intensity difference of concrete is big because of the big randomicity at the aspects of material , metage of additive , mix round , ratio of water and lime , spray construct and water maintain 由于喷射混凝土和二次衬砌在拌和料、外加速凝剂的称量、拌匀以及水灰比的配比、在喷射作业及洒水养护上都存在着很大的随机性，其强度的差异也较大。
3.
Through the analysis of contest experimental test questions from 1995 to 2003 , it is found that metage , synthesis , standardization and determination are the characteristics of these years " experimental test questions . chemistry experiment is based on the elementary knowledge , especially checking the usage of suction pipet and buret . the core of questions lies on the basic operation of metage , dissolution , suction , refluxing , filter , wash and titration 通过对1996 - 2003年化学竞赛决赛实验题进行分析得出： “称量?合成?标定?测定”是近几年实验试题的特点；化学实验重在基础，特别是考察移液管和滴定管的使用；基本操作如称量、溶解、移液、回馏、抽滤、洗涤、滴定等是实验考查的重点。
