硝酸铵是一种速效性肥料,属于生理()肥料。
A.酸性
B.碱性
C.中性
D.酸或碱性
参考答案:C
A.never dreamed of becoming an actress
B.always dreamed of becoming an actress
C.was not good at speaking
D.always thought she could be a good actress
在南半球,若两点间的恒向线航向为045°,则大圆始航向()。
A.大于045°
B.等于045°
C.小于045°
D.不一定