氮、磷、钾在土壤中含量相对少些，主要靠（）补充。
A、灌溉
B、施肥
C、中耕
D、排水
参考答案：B
预算定额是按照( )编制的。
A．社会平均先进水平 B．行业平均先进水平C．社会平均水平 D．行业平均水平
Our government has protested time and again that any increase in arms sales to Taiwan
is____________ the US government's_______________ the Chinese people but
the US government just turns a deaf ear to our protest. [ ]
A. breaking; promise
B. violating; commitment to
C．damaging；promise of
D. breaking; commitment with
