题目内容：
下列各式中正确的是( )．
参考答案：
答案解析：
单选题：下列各式中正确的是( )．
- 题目分类：高等数学一
- 题目类型：单选题
- 查看权限：VIP
为了防止计算机病毒的传染，措施之一是对长时间不使用的软盘经常格式化。（ ）
为了防止计算机病毒的传染，措施之一是对长时间不使用的软盘经常格式化。（ ）
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III Write a letter according to the task.You are organising a weekend team-buil
(本题满分8分)
(本题满分8分)