土壤中速效氮供应水平大于100PPM时,()。
A.供应较低
B.供应较高
C.供水应中等
参考答案:B
The stolen bag was finally found_____in the forest nearby with nothing left in it.
A.abandoned
B.adopted
C.returned
D.lost
孕前体重超过标准体重120%的女性,其适宜的孕期增重为()kg。
A.14
B.12
C.10
D.7~8