土壤水分根据作用力的类型和被作物利用的难易程度分为（）
A.吸湿水
B.膜状水
C.毛管水
D.>重力水
参考答案：A, B, C, D
These are five . [ ]
A. bus
B. buss
C. buses
D. bos
This is the small house less than 15 square meters, under _________ roof lives a large family of three generations.
A．which
B．that
C．its
D．whose
