Netware是局域网操作系统，它的系统容错分为三级，其中第三级系统容错采用______。
A．写后读验证
B．文件服务器镜像
C．磁盘双工
D．双重目录与文件分配表
参考答案：B
解析： Netware网络操作系统的系统容错分为三级：第一级采用了写后读验证、热定位、差错检测与校正、FAT与目录冗余、开机目录验证等技术；第二级采用了磁盘镜像和磁盘双工技术；第三级采用了文件服务器镜像。
Nowadays it is found that school students hardly have any sports. Is it because they have no 1 in sports? It may not be the fact. They often say they have 2 more important things to do. What are these important things? Examinations! They have to get themselves ready for the most important School Certificates of Education Examination（毕业会考），and also to deal with the tests and the exams in school. So many of them become bookworms. In the summer holidays after the Examination they could do 3 they like, but at the moment, they have to 4 all their time to the preparation. So studies have prevented them from going in sports. Because of the pressure（压力） 5 their parents and teachers, they have to work harder and spend most of their time on books. Many parents 6 their children to pass this examination in order to get a stepping stone for higher studies or better jobs. As for the 7 themselves, they want to get good results so that they can get their studies better. So it is necessary that they give up their school activities, especially sports. Indeed, every school cannot go 8 physical training, for a quick mind seldom goes along with a weak body. It is well said, "All work and no play 9 Jack a dull（迟钝的）boy." In one word, without a strong body, you can never do anything better, let alone a great success in 10 .
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