That book _____ Tracy 10 dollars.[ ]
A. takes
B. costs
C. spends
答案:B
农业生产中,主要施加的肥料是( )
A.化肥为主农家肥料配合施用
B.全部用农家肥料
C.农家肥料作基肥化肥作追肥
D.全用化肥
()
A.
B.
C.
D.