A.5 B.6 C.7 D.8
A.30級(jí)為24.0MPa B.25級(jí)為18.0MPa C.15級(jí)為10.0MPa D.10級(jí)為6.0MPa
A.灰砂磚 B.粘土磚 C.頁(yè)巖磚 D.煤矸石磚