单项选择题
A.L≥2H,且L≥1.0m B.L≥2H,且L≥1.5m C.L≥H,且L≥1.0m D.L≥H,且L≥1.5m
A.石灰砂浆 B.水泥砂浆 C.混合砂浆 D.粘土砂浆
A.1.2m B.1.5m C.1.8m D.2.0m