一般认为土壤盐基饱和度为83%则这种土壤属于()肥力的土壤
A.>肥沃土壤水平
B.中等肥力水平
C.土壤肥力水平
参考答案:A
The winning of hosting _______ 2010 World Expo is _______ victory not only for Shanghai residents, but for ___________ people of the whole Chinese nation.
A.the; a; the
B.a; the; a
C.a; a; the
D.the; the; a
以下变电站间隔单元,哪些为必填项()
A.单元编号
B.调度单位
C.投运日期
D.单元类型