Tu sais, la situation est<br/>difficile __ changer. A: de B: pour C: en D: à

UPS2000-G操作面板的默认密码 A: Changer B: Changeme123 C: 000001 D: Neteco

Compared with ordinary CNC machine tools, the most significant difference between a machining center is ( ) and ( ). A: servosystem B: magazine tool C: numerical control device D: automatic tool changer