1. [单选题]以下关于系统兼容性(system compatibility)的叙述，正确的是(60)。
A. 若两种计算机指令系统与体系结构不同，则无法实现高级语言程序兼容
B. 操作系统的内核在不同体系结构的计算机上是不能兼容的
C. 操作系统的外层在不同类型的计算机上是难以实现兼容的
D. 不同体系结构的计算机之间可以实现编译程序兼容
2. [单选题]
B． inefficient C． efficient D． useful
A. goodB． inefficient
B. efficient
C. useful
3. [单选题]are individuals and organizations that are actively involved in the project，or whose interests may be affected as a result of project execution or project completion．
A. Project manager
B. Project team member
C. Sponsor
D. Proiect stakeholders
