What type of binary tree is this? [ Select ] Full Binary Tree, Complete Tree Binary Search Tree (BST) In which order will the nodes be visited in a preorder traversal of the tree? 50, 30, 20, 10, 40, 70, 60, 80 In which order will the nodes be visited in an inorder traversal of the tree? [ Select ] 10, 20, 30, 40, 50, 60, 70, 80 80, 70, 60, 50, 40, 30, 20, 10 50, 30, 20, 10, 40, 70, 60, 80 In which order will the nodes be visited in a postorder traversal of the tree? [ Select ] 10, 20, 40, 30, 60, 80, 70, 50 50, 30, 20, 10, 40, 70, 60, 80 80, 70, 60, 50, 40, 30, 20, 10      多重下拉选择题