首页
登录
职称英语
[originaltext] One of the important materials used in the construction of bu
[originaltext] One of the important materials used in the construction of bu
游客
2024-02-23
66
管理
问题
One of the important materials used in the construction of buildings and roads is cement. It is a powder made mainly from limestone and clay. Even though the ancient Egyptians and Romans used a kind of cement, it was not until 1824 that an English bricklayer developed cement strong enough for modern roads and buildings.
While the bricklayer was experimenting in his kitchen, he found that a mixture of limestone and clay that had been heated formed a substance. This substance became hard and stone-like as it cooled. When it was grounded into a fine powder, it could be stored.
When the powder was mixed with water, it made an excellent quality of cement that quickly hardened in sunlight or even under water, it made an excellent quality of cement that is used today.
选项
A、By grinding heated limestone (石灰石) and clay and mixing them with water.
B、By mixing limestone, clay and water.
C、By grinding limestone and clay under water.
D、By burying limestone and clay underground.
答案
A
解析
事实题。浏览选项可知,本题问的是做某件事的“方式”,听录音时要捕捉到这个相关的信息,并做好标记。水泥制造工序中的关键词为grind,heated,mixed和water,在正确答案A中都得以体现。其他选项不完整或是词语的胡乱拼凑。
转载请注明原文地址:https://tihaiku.com/zcyy/3476134.html
相关试题推荐
[originaltext]Thisweeksomebiginternetsitesweresobusythattheystop
[originaltext]HongKongisacityinclinedtowardred;inThailandthecolo
[originaltext]Insurancecompaniesprovideaservicetothecommunitybypro
[originaltext]Insurancecompaniesprovideaservicetothecommunitybypro
[originaltext]M:ThevolcanicashfromtheeruptionofMountSaintHelenscerta
[originaltext]M:ThevolcanicashfromtheeruptionofMountSaintHelenscerta
[originaltext]Howmanyofyoudrinkcola?Nearlyeverybody.Didyouknowth
[originaltext]Howmanyofyoudrinkcola?Nearlyeverybody.Didyouknowth
[originaltext]Howmanyofyoudrinkcola?Nearlyeverybody.Didyouknowth
[originaltext]Peter’sunclelivedinthecountry.OncePeterwenttostayw
随机试题
Purchasingthenewproductionlinewillbea______dealforthecompany.A、profita
《公路桥梁板式橡胶支座》桥梁板式橡胶支座实测极限抗压强度应满足()。A:实测极
乳剂放置后,有时出现分散相逐渐聚集在上层或下层的现象称为()。A.乳剂破裂B.
患者男,56岁。在进行“右肝癌切除”手术过程中突然大出血,急需输血。该患者的血型
股份有限公司发放股票股利会带来的结果是( )。A.增加公司的现金流出 B.改
社会工作者小刘为老年人开设了园艺小组,旨在加强老年人之间的沟通交流,增强老年人的
(2021年真题)若无禁忌证,治疗2型糖尿病首选的口服降糖药物()A.沙格
A公司本来是一家效益比较好的制造型企业,但从2010年年末起,由于行业内竞争的加
下列关于砌筑砂浆的说法,正确的是()。A.对于砌筑砂浆用砂,优先选用中砂 B
流动资产的构成要素一般包括()。A、应付账款 B、存货 C、库存现金 D
最新回复
(
0
)