焊接电缆可以搭在液化石油气瓶、乙炔瓶或其它易燃物的容器和材料上。
参考答案：错
中国证券业协会正式成立于1991年8月28日。（）
Traversing a binary tree in preorder is equivalent to
A． Traversing the forest corresponding to the binary tree in root-first order.
B． Traversing the forest corresponding to the binary tree in root-last order.
C． Traversing the forest corresponding to the binary tree in breadth-first order.
D． None of the above.
