辅助生产部门可以分成()和动力部门两类。
A、工具车间
B、模具车间
C、辅助车间
D、机修车间
参考答案:C
33.In the reading –room there are tables, you can sit there to read .
A.at which
B.in which
C.and
D.where
聚苯乙烯(板状)( )