引入虚拟存储技术的关键前提是( )。
A.有大容量的外存
B.程序执行的局部性原理
C.硬件提供地址转换机制
D.选择一种合适的页面调度算法
参考答案:B
用括号内所给代词的适当形式填空
1. ______ are the students in Class. ______ English teacher is Mr Green. (they)
2. ______ are a new student. ________ books are over there. (you)
3. ______is a Japanese boy. ______ name is Bill. (he)
4. This is Lucy. _______ is a girl. That is ______ desk. (her)
5. ______ is Mimi. _______ English name is Joy. (it)
胸外除颤时,电极板应置于
A.胸骨左缘第3肋间和心尖区B.胸骨右缘第3肋间和心尖区C.胸骨左缘第2肋间和心尖区D.心尖区和右侧肩胛下角E.胸骨右缘第2肋间和心尖区