How many states are not on the contiguous continent of America? A: 1 B: 2 C: 3 D: 4
How many states are not on the contiguous continent of America? A: 1 B: 2 C: 3 D: 4
How many states are not on the contiguous continent of America? A: 1 B: 2 C: 3 D: 4
How many states are not on the contiguous continent of America? A: 1 B: 2 C: 3 D: 4
Canada's border with the United States is the world's longest land border, sharing land borders with the contiguous United States to the south, and the US state of Alaska to the northwest.
Canada's border with the United States is the world's longest land border, sharing land borders with the contiguous United States to the south, and the US state of Alaska to the northwest.
【单选题】Which one of the following statements is incorrect about Hodgkin lymphoma? A. Hodgkin lymphoma is characterized by the presence of Reed-Sternberg (RS) cells or the variants B. Hodgkin lymphoma always manifests systemic manifestations C. Hodgkin lymphoma always arises at a single lymph node and spreads characteristically in a stepwise fashion to contiguous lymph nodes D. Hodgkin lymphoma accounts for 80% of all lymphomas
【单选题】Which one of the following statements is incorrect about Hodgkin lymphoma? A. Hodgkin lymphoma is characterized by the presence of Reed-Sternberg (RS) cells or the variants B. Hodgkin lymphoma always manifests systemic manifestations C. Hodgkin lymphoma always arises at a single lymph node and spreads characteristically in a stepwise fashion to contiguous lymph nodes D. Hodgkin lymphoma accounts for 80% of all lymphomas
11、 一个文件有100个磁盘块,假设文件控制块在内存(如果文件采用索引分配(indexed allocation),索引表也在内存)。在下列情况下,请计算在contiguous, linked, indexed(single-level)三种分配方式下,分别需要多少次磁盘I/O操作?(每读入或写入一个磁盘块都需要一次磁盘I/O操作) 假设在contiguous分配方式下,文件头部无空闲的磁盘块,但文件尾部有空闲的磁盘块。假设要增加的块信息存放在内存中。 (1)在文件开始处添加一个磁盘块; (2)在文件结尾处添加一个磁盘块; (3)在文件中间删除第50块磁盘块;(假设磁盘块编号从0—99) (4)在文件第50块前添加一个磁盘块; (假设磁盘块编号从0—99)
11、 一个文件有100个磁盘块,假设文件控制块在内存(如果文件采用索引分配(indexed allocation),索引表也在内存)。在下列情况下,请计算在contiguous, linked, indexed(single-level)三种分配方式下,分别需要多少次磁盘I/O操作?(每读入或写入一个磁盘块都需要一次磁盘I/O操作) 假设在contiguous分配方式下,文件头部无空闲的磁盘块,但文件尾部有空闲的磁盘块。假设要增加的块信息存放在内存中。 (1)在文件开始处添加一个磁盘块; (2)在文件结尾处添加一个磁盘块; (3)在文件中间删除第50块磁盘块;(假设磁盘块编号从0—99) (4)在文件第50块前添加一个磁盘块; (假设磁盘块编号从0—99)
考虑一文件存放在100个数据块中,文件控制块、索引块或索引信息都驻留内存。那么,如果( ),不需要做任何磁盘I/O操作。 A: 采用contiguous allocation策略,将最后一个数据块搬到文件头部 B: 采用single level indexed allocation策略,将最后一个数据块插入文件头部 C: 采用linked allocation策略,将最后一个数据块插入文件头部 D: 采用linked allocation策略,将第一个数据块插入文件尾部
考虑一文件存放在100个数据块中,文件控制块、索引块或索引信息都驻留内存。那么,如果( ),不需要做任何磁盘I/O操作。 A: 采用contiguous allocation策略,将最后一个数据块搬到文件头部 B: 采用single level indexed allocation策略,将最后一个数据块插入文件头部 C: 采用linked allocation策略,将最后一个数据块插入文件头部 D: 采用linked allocation策略,将第一个数据块插入文件尾部