单项选择题
A.水泥砂浆 B.混合砂浆 C.粘土砂浆 D.石灰砂浆
A.1.2MB.1.5MC.2MD.3M
A.0.6M B.0.9M C.1.2M D.1.8M
A.8MM B.10MM C.12MM D.15MM
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