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【多选题】
预热闪光对焊与连续闪光对焊相比，具有（）特点。A.
降低焊后的冷却速度
B.
缩短闪光阶段时间
C.
焊接周期长
D.
可用功率较小的焊机焊接大断面焊件
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【简答题】Put your baggage on the belt please.
【单选题】One major difference between the look-say method of learning reading and tile phonics method is______.
A.
look-say is simpler
B.
phonics takes longer to learn
C.
look-say is easier to teach
D.
phonics gives readers access to far more words
【单选题】One major difference between the look-say method of learning reading and the phonics method is 查看材料
A.
look-say method is simpler
B.
phonics method takes longer to learn
C.
look-say method is easier to teach
D.
phonics method gives readers access to far more words
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