栈结构不适用于下列哪一种应用( )
A．表达式求值 B．树的层次次序周游算法的实现C．二叉树对称序周游算法的实现 D．快速排序算法的实现
参考答案：B
So far, several cases of a disease, _____ as bird flu, are reported to have been found in the country. [ ]
A. knowing
B. to be known
C. having known
D. known
与多媒体计算机配套的软件有( )。
A．支持多媒体功能的操作系统
B．多媒体数据准备软件
C．多媒体作品的写作软件
D．各种多媒体教学软件
