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更多“cement（）”相关的问题
第3题
Fly ash can partly take the place of ______.A. paving materialB. cement C. concrete D.
Fly ash can partly take the place of ______.
A. paving material
B. cement
C. concrete
D. the coal by-product
第7题
According to the text, concrete is also a “climate-change villain” mainly becauseA．sand or
According to the text, concrete is also a “climate-change villain” mainly because
A．sand or gravel has to be used as an aggregate in the process of mixing.
B．the materials which are used to make concrete are not durable.
C．recycling of concrete is quite difficult when concrete breaks down.
D．chemical reaction in manufacturing cement emits carbon-dioxide world-wide.
第8题
现用《水泥企业质量管理规程》由（）制订。
A.中华人民共和国工业和信息化部
B.中华人民共和国国家发展和改革委员会
C.中华人民共和国国家质量监督检验检疫总局
D.中国建筑材料科学研究总院
第11题
以下关于横担安装描述错误的是()。
A.15°以下的转角杆采用单横担
B.15°~45°的转角杆采用双横担
C.线路水平排列时，横担与水泥顶部的距离为200mm
D.水平排列的横担应平整，端部上下和左右斜扭不得大于30mm
