CO2气体保护焊，如果采用有足够脱氧元素的焊丝，就不易产生飞溅。( )
参考答案：对
I don't enjoy computer games now, but I ______ like them when I was younger. [ ]
A. was used to
B. used to
C. would
D. shall
货币贬值不一定能改善一国的贸易收支
