一棵二叉树如下图所示，若采用顺序存储结构，即用一维数组元素存储该二叉树中的结点(根结点的下标为1，若某结点的下标为i，则其左孩子位于下标2i处、右孩子位于下标2i+1处)，则该数组的大小至少为(37)；若采用二叉链表存储该二叉树(各个结点包括结点的数据、左孩子指针、右孩子指针)，则该链表中空指针的数目为(38)。

A query is used to search through the database to locate a particular record or records, which conform. to specified (75) .

A Web (73) is one of many software applications that function as the interface between a user and the Internet

Files can be lost or destroyed accidentally．Keep (74) copies of all data on removable storage media．

The (72) is a collection of modules serving as interface between hardware and software to provide a software platform．

Each program module is compiled separately and the resulting (71) files are linked together to make an executable application.

(55)

(53)

CPU中，保存当前正在执行的指令的寄存器是(59)。表征指令执行结果的寄存器是(60)。

(51)

软件测试通常采用黑盒测试和白盒测试。其中黑盒测试根据软件的(55)设计测试用例，白盒测试根据软件的(56)设计测试用例。