下列常见化学肥料中，（）为复合肥料.
参考答案：磷酸二氢钾
Nobody could tell me the way because _____ people were there in the night. [ ]
A. few
B. a few
C. little
D. a little
分煤层损失计算图的比例尺是（）。
A.1/500
B.1/1000
C.1/2000
D.1/5000
