工艺系统
参考答案:
在机械加工时,机床、机床夹具、刀具和工件形成了一个完整的加工系统。
三(2)班同学新购买科技书和文艺书共68本,文艺书的本书比科技书的4倍少7本.新购买的文艺书是多少本?
The man insisted _____ a taxi for me even though I told him I lived nearby. [ ]
A. find
B. to find
C. on finding
D. in finding