混凝土立方体抗压强度试验中,测出一组试件的抗压强度分别为43.2 MPa、45.5 MPa、44.8MPa,则抗压强度测定值为________。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
免费的网站请分享给朋友吧