单项选择题 压铸模具分型面上的飞边厚度，一般应小于(  )。   A、0.02～0.1   B、0.1～0.2 C、无 D、无

单项选择题 Combine these three sentences together using ellipsis: A government of the exploiting class cannot possibly survive. A government by the exploiting class cannot possibly survive. A government for the exploiting class cannot possibly survive. A、The exploiting class cannot possibly survive of and by and for a government. B、A government of, by and for the exploiting class cannot possibly survive. C、A government of the exploiting class cannot possibly survive by and for. D、The exploiting class of, by and for a government cannot possibly survive.

多项选择题 金属成型类数控机床包括( )。