北部湾经济区建设过程中，崇左市要重点发展锰业循环经济、出口加工和（）等特色产业。
A.陶瓷
B.医药
C.机械
D.糖业
参考答案：D
When the minister came to the snow-stricken area, he was happy to see the disaster victims well_____．
A．take care of
B．took care of
C．taken care of
D．taking care of
氩弧焊时，若采用钍钨棒作电极，会产生（）性。
A.毒性
B.强光
C.放射
