The Clarks China for 6 years, and they are very familiar with Chinese culture. A. have been away from B. have been in C. have been to D. haven’t lived in 答案:B关于土壤与农业生产关系的叙述,正确的是
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A.土壤是农业生产的最基本的生产资料
B.土壤是可更新资源,农业生产中怎样利用土壤,其肥力也不损耗
C.一般来说,土壤中有机质多,就是好土壤
D.肥沃的土壤能在一定程度上抵抗不利的自然条件的影响,适应植物生长的需要