题目内容
（请给出正确答案）
[多选题]
以下属于焊芯的作用的有（）。
A.传导焊接电流，产生电弧把电能转换成热能
B.本身熔化为填充金属，与母材金属熔合形成焊缝
C.具有机械保护作用
D.使焊条具有良好的焊接工艺性能
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A．presupposes
B．entails
C．contradicts
D．includes
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第1题
The question “How fast did he drive when he ran the red light？"_____ He ran the red light",。
第3题
Have you forgotten ______ when he died？
A、how old he was
B、how old was he
C、what did he say
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第4题
－－－ ________________？－－－ Two years ago.A. Where did he goB. When did he go to AmericaC.
--- ________________？
--- Two years ago.
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第5题
－－－ __________？－－－ Two years ago.A. Where did he goB. How long has he been in AmericaC.
--- __________？
--- Two years ago.
A. Where did he go
B. How long has he been in America
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第6题
How did the writer feel when he saw the fence and bulldozers？A．Scared.B．Confused.C．Upset.D
How did the writer feel when he saw the fence and bulldozers？
A．Scared.
B．Confused.
C．Upset.
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第7题
How did the speaker feel when he ran his first mile？He felt it was the ________ thing he h
How did the speaker feel when he ran his first mile？
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第8题
_____that we couldn' t catch up with him.A．So fast he ranB．So fast did he runC．So fast ran
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B．So fast did he run
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第9题
How did people use to respond when their kids got into trouble at school？A．They'd question
How did people use to respond when their kids got into trouble at school？
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C．They'd tell the kids to calm down.
D．They'd put the blame on their kids.
第10题
So carelessly did he drive that he almost killed himself.（)
So carelessly did he drive that he almost killed himself.()
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