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铝合金整体壁板的毛坯以_和_为主。

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大型整体壁板的成形技术主要有、_和__三种成形方法。

壁厚小、易于成形的圆柱面和圆锥面壁板采用增量压弯成型。

A. 对
B. 错

The LZ 129 Hindenburg, named after Hindenburg, a famous German general during the First World War and President of Germany.

A. Erich
B. Paul Von
C. Ferdinand von
D. Joseph

How many people were killed in the Hindenburg Disaster?

A. 35
B. 36
C. 62
D. 71