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14. ______ are not leached out of soil, reclamation procedures are needed to restore the land’s productivity. A) For concentrations of salt B) Salt concentrations that C) If salt concentrations D) With concentrations of salt

答案：C
難度： 適中
1F
Sharon Wei 大一下 (2014/03/06)
If salt concentrations are not leached out of soil,reclamation procedures are needed to restore the land’s productivity.


14. ______ are not leached out of soil, ..-阿摩線上測驗