— Is your uncle a carpenter? — [ ]
A. Yes, he isn't.
B. No, he is.
C. Yes, he is.
答案:C
在UFPP一次喷淋EG停运过程中1252-P01停后,大气腿中EG落入冷井使冷井液位上升。()
铁矿石中除铁矿物以外的物质都称为脉石。()