In fact, who puts presents into children's empty stockings?

二叉树的非递归遍历是通过将递归工作栈自己进行管理来设计的，下列中根序遍历的非递归算法中（1）的正确判断语句应该是（ ）。template void BinaryTree :: InOrderTraverse () { stack S; BiTreeNode * p; S.makeEmpty( ); p = root; //初始化 do{ while ( p ) { S.push(p); p = p→leftChild; } if ( !S.empty( ) ) { //栈非空 p = S.top( ); S.pop( ); //退栈 cout<< p→data; //访问根结点 p = p→rightChild; //向右链走 } } while ( （1） );} A: p ！= NULL B: !empty( ) C: p!= NULL || !empty() D: p!= NULL && !empty()

Nicky first went to the chemist's and then to the bookshop. A: True B: False C: Empty D: Empy

What was Conan Doyle's first Holmes novel? A: A Study in Scarlet B: The Empty House C: The Sign of Four

10.In the novel, Dorian Gray’s life can be summarized as _____. ? empty life;|double life|vain life|immoral life

Where do the students arrange the meet A: In the library. B: In the woman's dormitory. C: In an empty classroom. D: In the dining hall.

10.Let’s put up some pictures on the ______ walls. A: A) blank B: B) empty C: C) bare D: D) hollow

The traffic police were searching for evidence to prove the accused man’s guilt, but in （）. A: hollow B: empty C: void D: vain

grep 'line.*empty' 会匹配下列哪些行？ A: this line is empty B: this line empty C: this line.empty D: this lineempty

5. There’s description of Dao as empty and yet being the source of all things as a metaphoric association with___. A: the eye B: the womb C: the nature