问答题 [函数5-2] bool Isgrowing(BTreeNode* root, ElernKeyType akey) { BTreeNode *t, *f; if( !SearchBtree( {{U}}(4) {{/U}}) ) { t=f; while ({{U}} (5) {{/U}}) { t=t -＞ parent; } if( !t ) return TRUE; } return FALSE; }