泥浆的比重过大，将妨碍泥浆与（）间的置换，导致墙体质量降低。

A.2%~8%
B.0.5%~0.8%
C.0.2%~0.8%
D.0.05%~0.10%

A.0.10%~0.50%
B.3%~5%
C.2%~8%
D.0.05%~0.10%

A.Na₅P₃O₁₀
B.Na₆P₆O₁₈
C.NaHCO₃
D.Na₅H₃O₁₀