数控车床刀具从结构上可分为整体式和镶嵌式。
参考答案：对
Mr Brown was much disappointed to see the washing machine she had had_______went wrong. [ ]
A. it
B. it repaired
C. repaired
D. to be repaired
群补蜂必须逐步进行，一次只能补2-3张带幼蜂的封盖子脾
