施用有机肥料有哪些弊端,应如何克服?
参考答案:
弊端:易造成肥效下降,利用率降低,土壤耕性变差,甚至养分比例失调,农产品品质下降。有机肥料与化肥配合施用。
不宜与氨基糖苷类抗生素合用的药物是( )。
A.甘露醇B.氢氯噻嗪C.呋塞米D.阿米洛利E.螺内酯
Look, the Maths teacher with his students _________on the grass to have a good rest at present.
A.is lying
B.is lieing
C.are lying
D.be lying