主频是指计算机的时钟频率。

毛 * * 指出：“读书是学习，使用也是学习，而且是更重要的学习。”这句话告诉我们（　　）

A．既要从书本中获得知识，更应重视在实践中获得真知

B．实践就是学习，学习就是实践

C．只有实践才能获得知识

D．实践是认识的目的

Having the highest marks in her class, a scholarship was offered her by the Department.

A．she was offered a scholarship by the Department

B．a scholarship was offered to her by the Department

C．the Department has a scholarship to offer her

D．the Department offered her a scholarship

老年人用药应注意的事项是

A．要认识老年人常患多种慢性病及症状不典型的特点

B．要注意老年人的生活环境

C．要结合老年人的具体条件开展药物治疗

D．要进行心理治疗

E．要切记老年人多种功能减退，要特别注意合理选择药物

防突技术资料的管理工作应当符合哪些要求？