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【单选题】
外排序是需要使用硬盘等外部存储设备进行大数据集合排序的过程或算法,其中一种策略是“排序-归并”,如下图所示。仔细理解该图所表达的基本思想,回答问题。 参见图示。如果:内存块数为 ,每块可装载 个元素,待排序元素集合所占用磁盘块数 ,则关于此集合的排序问题,下列说法正确的是_____。A.
首先将待排序元素集合划分为2个子集合，每个子集合为12块，将每个子集合从磁盘装入内存并采用任何内排序算法进行排序后再写回磁盘；然后再一个轮次对这2个已排序子集合进行归并操作，完成最终排序
B.
首先将待排序元素集合划分为4个子集合，每个子集合为6块，将每个子集合从磁盘装入内存并采用任何内排序算法进行排序后再写回磁盘；然后再对这4个已排序子集合进行归并操作，完成最终排序
C.
首先将待排序元素集合划分为6个子集合，每个子集合为4块，将每个子集合从磁盘装入内存并采用任何内排序算法进行排序后再写回磁盘；然后再对这6个已排序子集合进行一个轮次的归并操作，完成最终排序
D.
前述(A)(B)(C)都正确
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【简答题】According to Cliff Young himself, what made him run throughout the race?
【简答题】7 Soon, the marathon started and the young athletes left Cliff far behind . The crowds smiled, and some laughed out loud because he didn’t even run properly. He had the strangest running style ; he ap...
【简答题】Soon, the ____ started and the young athletes left Cliff far behind. The ____ smiled, and some laughed out loud because he didn't even run properly. He had the strangest running style; he appeared to ...
【单选题】If he had come a little early, he the bus.
A.
would catch
B.
would have caught
C.
would have catch
D.
have caught
【多选题】Why did some people laugh at Cliff Young when he was running?
A.
Because Cliff Young didn’t run properly.
B.
Because Cliff Young had the strangest running style.
C.
Because Cliff Young appeared to shuffle.
【单选题】某A项工作有两项紧后工作D和E, D的最迟完成时间为20d,持续时间为13d; E的最迟时间为25d,持续时间为15d。则A工作的最迟完成时间为( )d。
A.
20
B.
15
C.
10
D.
7
【简答题】According to Cliff Young himself, what made him run throughout the race?(Para. 8)
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