相关知识点: 试题来源: 解析 答案:is composed。分析句子结构及句意可知,本句描述的是客观事实,句中缺少谓语,主语和compose之间是被动关系,be composed of是固定短语,意思是"由...组成",故填is composed。 混凝土由水泥、砂和砾石与水混合而成。反馈 收藏 ...
The invention relates to the field of silicone rubber composite processing, and specifically relates to a silicone rubber cement with a high airtight property for preparing ultrathin sealing rubber layers, and a preparation method thereof. The silicon rubber cement is composed of the following raw ...
Acementmixer agitates thecementuntil it is ready to pour. 水泥搅拌机把水泥搅动得可以倒出来用为止. 《简明英汉词典》 Concrete is composed ofcement, sand and gravel mixed with water. 混凝土由水泥 、砂、石子与水掺和而构成. 《用法词典》
变硬的东西，起粘合材料的作用 ③a building material that is a powder made of a mixture of calcined limestone and clay 由煅烧石灰石和粘土混合制成的粉末状建筑材料。④ bind or join with or as if with cement 用水泥粘合或接合
Cement is termed as a cementitious or hydraulic material that is composed of an inorganic material (or a mixture of inorganic materials) “that sets and hardens by chemical reaction with water and is capable of doing so under water” [2]. According to ACI Concrete Terminology [1], cement ...
If people have been distinguishing between these words for well over a hundred years, and millions of dollars in advertising money has been spent, and innumerable angry letters and tweets composed, why is it that this dictionary still defines cement as “concrete”? Is is from ignorance? Spite...
Cement slurryis a mixed liquid that is composed of cement, water, and various chemical additives and has a certain density. No matter which cementing method is used, cement slurry contacts certainly with the oil and gas reservoir. The cement slurry has a much larger filtration loss than drillin...
译文：混凝土是由沙子、石头、硅酸盐水泥和水混合而制成的人造石。这种混合物形成了一种所要形状和大小，硬化变成了一种石头般的物质，称为混凝土。There are basically three materials we start with to make concrete: One is the aggregate, which is made up of the fine and coarse aggregates together, ...
Research on Composite Cement of Phosphoaluminate-Portland Clinkers by Orthogonal Test The composite cement that is composed of phosphoaluminate-portland clinkers, gypsum and additive is prepared. Mechanical performances of the composite ceme... SU Lei,YI Zhao-Hua,GF Zhai,... - 《Journal of Jinan...
Concrete is a composite material composed of fine and coarse aggregate bonded together with cement that hardens over time. It is widely used due to its durability strength and versatility.,站酷海洛,一站式正版视觉内容平台,站酷旗下品牌.授权内容包含正版商