问题
单项选择题
数据库的特点之一是数据的共享，严格地讲，这里的数据共享是指 ______。
A．同一个应用中的多个程序共享一个数据集合
B．多个用户、同一种语言共享数据
C．多个用户共享一个数据文件
D．多种应用、多种语言、多个用户相互覆盖地使用数据集合
答案
参考答案：D
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数据库的特点之一是数据的共享，严格地讲，这里的数据共享是指 ______。
A．同一个应用中的多个程序共享一个数据集合
B．多个用户、同一种语言共享数据
C．多个用户共享一个数据文件
D．多种应用、多种语言、多个用户相互覆盖地使用数据集合
参考答案：D
Friend is better than fortune. Friend is worse than poison in some  cases. The two sentences above are opposite and seem to be unreasonable but they can be explained as follows: the first refers to all good friends who drive us towards good while the second all bad ones who lead us to wrong ways.My ideal friend is of course a good friend whose goodness is shown below---he has no bad likings, such as smoking and drinking. He lives in frugality (节俭). He studies hard so as not to waste his golden time. At home he honors his parents and loves his brothers; at school he respects his teachers and shares feelings with his classmates. He treats those truly who are true to him. In a word, he has all the good characters better than mine. I can follow him as a model. With his help I am free from all difficulties. Indeed, if I have such a person as my friend, I shall never fear difficulty and I shall never know the existence of the word "failure". 小题1:This passage tells us ( )
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