Virtualization is an approach to IT that p_爱下问搜题

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问题单项选择题

Virtualization is an approach to IT that pools and shares (71) so that utilization is optimized and supplies automatically meet demand. Traditional IT environments are often silos, where both technology and human (72) are aligned around an application or business function. With a virtualized (73), people, processes, and technology are focused on meeting service levels, (74) is allocated dynamically, resources are optimized, and the entire infrastructure is simplified and flexible. We offer a broad spectrum of virtualization (75) that allows customers to choose the most appropriate path and optimization focus for their IT infrastructure resources.

（73）处填（）。

A．system

B．infrastructure

C．hardware

D．link

答案

参考答案：B

单项选择题

设有s(学号，姓名，性别)和sc(学号，课程号，成绩)两个表，如下SQL语句检索选修的每门课程的成绩都高于或等于85分的学生的学号、姓名和性别，正确的是 ______。

A．SELECT 学号，姓名，性别 FROM S WHERE EXISTS (SELECT * FROM SC WHERE S学号=学号 AND 成绩＜=85)

B．SELECT 学号，姓名，性别 FROMS WHERE NOT EXISTS (SELECT * FROM SC WHERE S学号=学号 AND 成绩＜=85)

C．SELECT 学号，姓名，性别 FROMS WHERE EXISTS (SELECT * FROM SC WHERE S学号=学号 AND 成绩＞85)

D．SELECT 学号，姓名，性别 FROM S WHERE NOT EXISTS (SELECT * FROM SC WHERE S学号=学号AND成绩＜85)

完形填空

A few years ago, when I was about 14,I went out for a walk 31 a rainy summer day. I saw a man 32 small, dirty colthes. He had 33umbrella, and he was picking bottles out of bushes. When he found 34 ,he smiled and put it in his big bag. I thought,“I wish there 35 some way to help him. Well, I could give him my umbrella.” Then I walked to him 36 gave the umbrella to him.“You need this more than I 37 .” The man took it with 38 big smile on his face and said,“Thank you! Thank you!” And then I walked away 39 good, I turned around and saw him 40a lot more, even though he was still picking bottles from bushes. “It was just an umbrella.” I thought, not 41 that it was the kindness 42 made him happy.
A few weeks later I was walking on a sunny day, and 43 the same man with the same clothes, 44 the same big bag 45 of bottles. The only 46 was that my umbrella was right in the corner, looking47 he cherished（爱护） it. It was so clean.
It didn’t 48 that I couldn’t give the man a house and a job and I only did I was able to do. But 50made someone else happier, so that was enough.

D．considering

D．rather than