【多选题】二氧化碳气体保护焊的主要工艺参数有( )等。
【多选题】下列属于二氧化碳气体保护焊短路过渡焊时的主要焊接工艺参数有()
【单选题】What's wrong with Jessie?
A.
She has a stomachache.
【单选题】It was there, the police believe, _________ she was able to activate the recorder she kept in he
A.
22. It was there, the police believe, _________ she was able to activate the recorder she kept in her bag. A.until
【单选题】—Lucy has never been to Qingdao, has she? —________. She hopes to go there one day. [ ]
【简答题】A.She has to catch the train. B.She has to catch the bus. C.She has to go to work. D.She is tired.
【单选题】This is a photo of my aunt when she had______, and now she has a few ______.
A.
short hairs; grey hair
B.
short hair; grey hairs
D.
short hairs; grey hairs
【简答题】A.She has to meet a friend. B.She has to fly to Argentina. C.She has to attend a meeting. D.She has to lunch with the man next week.
【单选题】plt.savefig保存图片可以保存成什么格式