简答专家系统的基本思想。
参考答案：是简明的，即应用人工智能技术，将专家的知识转换并存储到计算机中，模仿专家进行知识推理和提建议，达到专家解决问题的能力。
根据对话内容，在空白处填写适当的话语（话语可能是一个句子，也可能是一个短
语或一个词），使对话完整。
A: Hi, Daming! You look upset. ___1___?
B: I argued with my parents last night.
A: Why?
B: I want to choose the best high school, but they ___2___ with me.
A: Only because of your bad grades?
B: Yes. So these days I ___3___very late, even after 12: 00. I really hope to have the
chance to study at the best high school.
A: I'm surc effort and confidence can change anything.
B: ___4___. We must pay more attention to studying than playing during these 30 days.
A: But you should also look after your health well.
B: ___5___.
A: You are welcome.
营销信息系统中如实登记（）和票据编号等信息。
A、开票时间
B、保管人
C、开票人
D、票据类型
