灌溉水的允许含盐量一般应小于( )A.1g/LB.2g/LC.3g/LD.4g/L
灌溉水的允许含盐量一般应小于( )
A.1g/L
B.2g/L
C.3g/L
D.4g/L
相关考题:
2、小麦容重测定时,两次平行试验结果允许差不超过()。A.1g/LB.2g/LC.3g/LD.4g/L
灌溉水的允许含盐量一般应小于( )
A.1g/L
B.2g/L
C.3g/L
D.4g/L