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【单选题】
电阻焊就是在（）的作用下，利用电流通过焊接区的电阻产生的热量进行加热，从而形成焊接接头。A.
压力
B.
电流
C.
电压
D.
电阻
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反馈参考答案：
举一反三
【单选题】He hadn’t seen his mother for a long time, so when he saw his mother he _____ crying.
A.
burst out
B.
burst into
C.
burst in
D.
burst on
【单选题】What does Peter mean?
A.
He means his mother is better.
B.
He thinks his mother is very well.
C.
He thinks his mother is very ill.
【单选题】He hasn't seen his mother for five years. He is ______ forward ______ his mother at once. [ ]
A.
look; to see
B.
look; to seeing
C.
looking; to seeing
参考解析：
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