关于计算机病毒预防，正确的描述是( )。
A．建立备份，加写保护，不用来历不明的软盘
B．控制软盘流动、经常做格式化，不要把软盘放在潮湿地方
C．采用密码技术和数字签名与认证
D．专机专用，经常做备份，经常做系统的冷启动，不要加保护
参考答案：A
解析： 计算机病毒的传播与计算机所处的环境、物理因素基本无关，应该从管理规章制度入手，尽早预防、检测和清除病毒。
| 阅读理解。 | |||
numbers. Drinks are provided. Food may be bought from the shop and eaten in the area provided outside the cinema. Ticket price: Aduits: $16; Children undr 6:$6; students under 16:$10 Smoking is not allowed anywhere in the cinema. Mobile phones must be kept off. | |||
| 1. What film can you see on a Saturday night in October? | |||
| A. Lord of the Rings (Ⅲ) The Return of the King. B. Lord of the Rings (Ⅱ) The Two Towers. C. The Lion King, Shrek (Ⅱ). D. Voldemort. | |||
| 2. When can you see the film Voldemort? | |||
| A. Tuesday, October, 4 p.m. B. Tuesday, October, 10 p.m. C. Thursday, September, 8 p.m. D. Friday, September, 4 a.m. | |||
| 3. How much will it cost for a family with two children (one is 5 and the other is 8) to see a film? | |||
| A. $ 22. B. $ 30. C. $ 44. D. $ 48. | |||
| 4. .When can people book tickets? | |||
| A. The day before the film. B. Anytime before the film. C. An hour before the film. D. No later than half an hour before the film. | |||
| 5. When can people book tickets? | |||
| A. The day before the film. B. Anytime before the film. C. An hour before the film. D. No later than half an hour before the film. |
曹墓之争
2009年12月，河南安阳发现一座东汉大墓，一些学者依据该墓的规模、形制、遗物及文献记载等，认定这是曹操墓，由些引发了各界热议。
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问题：
（1）此事之所以引起广泛关注，原因之一在于墓主曹操是一位重要的历史人物。请你列举两个与曹操有关的史实。
（2）从材料一来看，质疑者的依据是什么？（4分，不得摘抄原文）
（3）根据材料二，你认为史家怎样才能增加学术可信度，写出信史？