题目内容

How much did it cost?

A. 50$
B. 100$
C. 200$

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What are they made of ?

A. leather
B. denim
C. silk

How much did it cost?

A. 90$
B. 95$
C. 99$

Where aere they made?

A. China
B. Korea
C. Italy

【多选题】压力加工机械是靠压力机和模具对板材、型材、粉末等施加外力,使之产生变形从而获得所需工件的成形加工机械,下面哪些机械是压力加工机械设备?

A. 机械压力机
B. 液压机
C. 折弯机
D. 剪板机