零件的加工精度有哪几种？
参考答案：
尺寸精度、形状精度与位置精度.
用所给词的适当形式填空。
1. Bill Gates became ________ (interest) in software when he was only 13.
2. Bill Gates is the man who is taking the ________ (person) computer into everyone's home.
3. Mrs. Wang is very nice. She is ________ (friend) to us every student.
4. Grace is very sure of ________ (she).
5. My father plans ________ (retire) at the age of 50.
按照规定，期货交易所的风险管理制度不包括( )。
A．持仓限额和大户持仓报告制度B．涨跌停板制度C．全额交割制度D．风险准备金制度
ng the ________ (person) computer into everyone's home.