常用于加工花茶的原料茶是（）。
A.炒青
B.蒸青
C.烘青
D.晒青
参考答案：C
The policeman asked the child _____ so that he could take him home. [ ]
A. where did he live
B. where he lived
C. how he lived
什么叫调速系统速度变动率？
