下列选项，不属于气泡混合轻质土的组成成份的选项是（）
A.固化剂
B.气泡
C.沥青
D.基质土
参考答案：C
— I saw Betty go to Grandpa Zhang's home just now.
— Yes, she is often seen the old man with his housework. [ ]
A. help
B. to help
C. helps
D. helped
物理的配伍变化常见的有（）、（）和（）等。
