皮皮学，免费搜题
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【判断题】
CO 2 气体保护焊时,焊接回路电感越小,则短路过渡频率就越小。A.
正确
B.
错误
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皮皮学刷刷变学霸
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【单选题】who is the speaker talking to?
A.
her husband
B.
her children
C.
psychiatrist
D.
lawyer
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【单选题】Who is very homesick?
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speaker1
B.
speaker2
C.
speaker3
D.
speaker4
E.
speaker5
F.
speaker6
【单选题】Who is the inventor of email?
A.
Thomas Alva Edison
B.
Alexander Graham Bell
C.
Ray Tomlinson
【简答题】当年形成的会计档案，可暂由本单位会计机构保管至本年年底。()
【简答题】听下面一段材料，回答第1-3题。 1.Who is the speaker? A. A student. B. A player. C. A manager. 2.What time does the center open? A. 9:00 a.m. B. 9: 00 p.m. C. 5: 00 p.m. 3.What is the speaker mainly talking about? A...
【简答题】Who might be the speaker?
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