企业是自主经营、自负盈亏、自我发展、自我约束的独立的( )。
A．利益主体
B．商品生产经营者
C．市场经营者
D．生产主体
参考答案：B
The system has been designed to give students quick and easy _________ to the digital resources of the library.
A．access
B．passage
C．way
D．approach
机床进给机构的传动精度，影响加工的尺寸精度。( )
