首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Concrete Another thing to remember in connection with concrete is that you are not allowed very much leeway for errors in e
Concrete Another thing to remember in connection with concrete is that you are not allowed very much leeway for errors in e
admin
2009-01-05
91
问题
Concrete
Another thing to remember in connection with concrete is that you are not allowed very much leeway for errors in either measurements or location. Once you have a solid mass of concrete set in place, it is going to stay there. You have a difficult job ahead of you if you try to remedy a mistake. Make very sure, before you fill the form, that everything is where and how you want it.
There are numerous rules regarding the proper mixing handing, and finishing of concrete, but the essential one concerns the amount of water to use. The less water in the mix, the less the finished job will shrink. The less water used, the harder and more enduring the job after it has set.
The amateur concrete worker is plagued with two desires. One is to use enough Water to have the concrete nice and soft and easy to push around. You have been warned against that. The second is to take off the wooden forms too early, to see what the job looks like. That is really fatal. If the forms are stripped off too soon, while the concrete is still green, two things are likely to happen—you are almost sure to break off corners or edges, and you are likely to cause a major crack or defect in the body of the work. An excellent rule is to wait until you are sure the concrete is properly’ hardened, and then wait another day before removing the forms.
By the concrete being too "green", the author means that the concrete has
选项
A、become cracked.
B、not yet cured.
C、not dried out.
D、not settled in place.
答案
C
解析
转载请注明原文地址:https://kaotiyun.com/show/1NBK777K
0
专业英语四级
相关试题推荐
(1)Farmersinthedevelopingworldhatepricefluctuations.Itmakesithardtoplanahead.Butmostofthemhavelittlechoice:
PASSAGETHREEWhatwillpeopledowhentheirbrainsareexcitedaccordingtoCameliaandBrian?
(1)IcanstillrememberthefaceswhenIsuggestedamethodofdealingwithwhatmostteachersofEnglishconsideredoneofthei
Asheappliedsunscreentohisyoungdaughter’sface,DaraO’Rourke,professorofenvironmentalandlabourpolicyattheUni
HowtoWriteaSpeechWecancategorizethewholeprocessofwritingaspeechintotwostages.Thepreparatoryperiod
Schoolsthroughouttheworldareexperiencingaperiodofrapidchangeand,inmanycases,arefindingthatextremely【M1】______
Thedebateaboutproblemdrinkingandhowtostopitnowadayscentresmostontheworking-classyoung.Theyare【M1】______highly
Becauseoftherisingcostoffuel,scientistsarebuildingautomobileengineswhowillconservegasolinebutstillrunsmoothly
Thetendencynowadaystowanderinwildernessesisdelightfultosee.Thousandsoftired,nerve-shaking,over-civilizedpeoplea
JeffPetersandAndyTuckercouldneverbetrusted.Oneday,thetwomendecidedtoopenamarriagebusinesstomakesomequick
随机试题
以下符合预约定价安排有关规定的是()。
下列与牙齿有联系的经脉是( )
患者男,43岁。在参观朋友新居时出现流鼻涕、打喷嚏,继而出现明显喘憋,听诊闻及呼气音延长,双肺广泛哮鸣音,最可能出现了()。
有关散剂特点叙述不正确的是
下列有关对绝对肌力的描述中,哪一项是正确的
茶叶中咖啡因的提取方法是()。
下列选项中的哪些是关于行政行为确定力的正确理解?()
工程索赔中最关键和最主要的依据是()。
下列各项中,不属于报表输出方式的是()。
陈辉因其存于中国银行河南省郑州市分行甲区支行东风储蓄所的5万元存款被人冒领,欲诉诸法院。本案的被告是()。
最新回复
(
0
)