Another thing to remember in connection with concrete is that you are not allowed very much freedom 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, handling, 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 annoyed 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.
Questions:
1. What would be the title for the selection?
______________ ______________ _______________ ______________ _____________
______________ ______________ _______________ ______________ _____________
2. What does the essential rule concern?
______________ ______________ _______________ ______________ _____________
______________ ______________ _______________ ______________ _____________
3. What is one of the desires the amateur must resist?
______________ ______________ _______________ ______________ _____________
______________ ______________ _______________ ______________ _____________
4. Which of the following qualities is not essential in someone who works with concrete: carefulness, diligence, patience, or self-control?
______________ ______________ _______________ ______________ _____________
______________ ______________ _______________ ______________ _____________
5. What does the author mean by saying the concrete is green?
______________ ______________ _______________ ______________ _____________
______________ ______________ _______________ ______________ _____________
Unit 4
S1. Rules for Working with Concrete.
S2. The amount of water to use.
S3. To use too much water. / To take off the wooden from too early.
S4. Diligence.
S5. Not dried out. / Not dry enough.
高中英语语法-三十六计的英文表达方法
高中英语语法-英语短文中常用的转承语
高中英语语法-“金融诈骗”难逃法网
高中英语语法-如何提高书面表达的得分档次之一
高中英语语法-中国传统文化词汇集锦
高中英语语法-记叙文精选(2)之一
高中英语语法-如何翻译“西部大开发”
高中英语语法-More than 的用法
高中英语语法-记叙文精选(1)之一
高中英语语法-英语习作评改
高中英语语法-学点英文谚语 了解西方文化
高中英语语法-“球探”相中易建联
高中英语语法-共赏“来电”的感觉
高中英语语法-如何提高书面表达的得分档次之二
高中英语语法-英语写作中句式的多样化
高中英语语法-各种“学”和以-logy结尾的词(2)
高中英语语法-Stool pigeon 警察的眼线
高中英语语法-度英语单词“truthiness”登榜首
高中英语语法-记叙文精选(1)之二
高中英语语法-[怎么提高英语写作能力] 英文应试作文之二
高中英语语法-中国传统文化词汇集锦(2)
高中英语语法-如何写好开头和结尾
高中英语语法-与“星期”名称有关的习语
高中英语语法-“可再生能源”的表达法
高中英语语法-著名IT公司的英文名全搜集
高中英语语法-各种“学”和以-logy结尾的词(1)
高中英语语法-记叙文精选(2)之二
高中英语语法-“强权政治”的表达法
高中英语语法-巧用with复合结构
高中英语语法-写作中使用率最高覆盖面最广的基本句式之一
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |