土壤富铝化的标志是土壤粘粒的SiO2/A12O3的比值明显上升。
参考答案:对
长于消食化积的是( )
A.麦芽
B.炒麦芽
C.六神曲
D.炒神曲
E.焦神曲
--- How did you pay the workers? --- As a rule, they were paid ______.
A.by hour
B.by the hour
C.by hours
D.by an hour