硅酸盐水泥的标准稠度用水量一般在21%~28%之间。
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普通硅酸盐水泥强度等级分为42.5、42.5R、52.5、52.5R四个强度等级。
A. 对
B. 错
Positive Energy, the chemical term,was first transplanted into the social science field by British writer Richard Wiseman in a book in2012.
A. 对
B. 错
Anything orderly and transparent, or anything that follows justice and rule of law can be described as positive energy.
A. 对
B. 错