调拌模型材料时,普通石膏水粉比例为100g石膏粉加水
A.15~20m1
B.45~50ml
C.95~100ml
D.30~35ml
E.20~25ml
参考答案:B
_______ you know English well, you can go traveling in western countries without difficulty.[ ]
A. Granted
B. Provided
C. Unless
D. Whether
判定混凝土质量的强度,通常是以标准条件下养护7d龄期的立方体试件的抗压强度来表示。