单项选择题
A.水泥砂浆 B.油膏 C.细石混凝土 D.防水砂浆
A.石灰砂浆 B.混合砂浆 C.粘土砂浆 D.水泥砂浆
A.b=300mm，h=150mm B.b=320mm，h=140mm C.b=280mm，h=130mm D.b=290mm，h=160mm
A.700mm B.900mm C.1100mm D.1300mm
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