可以伴随着表的打开而自动打开的索引是 【8】 索引文件。
参考答案：结构复合(或结构)
[命题目的]本题主要考查表的索引。
[解慰要点]与表名相同的结构索引在打开表时都能够自动打开，但是对于非结构索引必须在使用之前打开索引文件。单独的.idx索引，是一种非结构单索引；采用非默认名的.cdx索引，也是非结构复合索引；与表名同名的.cdx索引，是结构复合索引。
[考点链接] Visual FoxPro中索引文件的类型。
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| China's mobile phone users are 1 to top 520 million at the end of this year, 2 the Ministry of Information Industry (MII,信息产业部). The prediction was made 3 the average (平均的) monthly rise of 5 million mobile subscribers in previous(前面的) years. 4 fixed-line (固定线路) users are expected to turn to cellphones as a 5 of falling prices of handsets and services, says the MII. The number of cellphone users 6 460 million at the end of 2006, 7 67.77 million year on year. On average, there are 35.3 cellphones in China for 8 100 people. China had its first mobile phone users in 1987 and it 9 ten years for the number of subscribers to reach 10 million. Four years later, the country had the 10 population of mobile phone subscribers in the world.
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