明中叶以前代表手工业生产技艺最高水平的是（）
A.民营手工业
B.家庭手工业
C.手工工场
D.官营手工业
参考答案：D
The Customs may "withhold" the goods connected with the smuggling cases. The word "withhold" has the similar meaning of the following words except ______.
A．keep back
B．detain
C．refuse to give
D．refund
EH油再生装置中硅藻士过滤器的作用。
