定修制以设备的实际技术状况为基础，与点检制互为（）关系.
A、补充
B、平行
C、因果
参考答案：C
— Didn't your friends play computer games yesterday?
— _________. They watched TV yesterday. [ ]
A. Yes, they didn't
B. No, they did
C. No, they didn't
D. Yes, they did.
按成型材料的不同，模具可分为（）和非金属模具。
A.专用模具
B.特制模具
C.金属模具
D.定制模具
