单项选择题“The age-old dream of the Chinese nation is being turned into reality, a dream to see the young educated, the sick treated, and the old cared for. (Wen Jiabao)”uses ( ). A. antithesis B. alliteration C. parallelism D. metaphor
单项选择题硬盘中的数据文件一旦被删除，则无法找回，因此为了保障信息的可用性，我们应当及时备份重要数据。 A、正确 B、错误
