下列不属于土壤水分的类型的是()
A、吸湿水
B、膜状水
C、毛管水
D、无效水
参考答案:D
链轮由哪几种材料制成,它有何特点?
一 Mom,what did your doctor say?
一 He advised me to live _____ the air is fresher. [ ]
A. in where
B. in which
C. the place where
D. where