土壤盐渍化
参考答案：
是指土壤的盐化和碱化。
I like listening to music on the radio , but I can't ______ much time ______ it .[ ]
A. pay ; for
B. spend ; on
C. cost ; listening to
D. take ; in
何谓“辛开苦降”？
on the radio , but I can't ______ much time ______ it .[ ]