听力原文：M: You're going to make a trip to Iceland, aren't you？
W: Yes. But I haven't got the plane ticket yet. I'm thinking of postponing the trip to next month since this is the busiest month for the airlines.
Q: What do we know about the woman from the conversation？
(19)
A. She has to change the time for the trip.
B. She hasn't decided where to go next month.
C. She can't afford the time for the trip.
D. She will manage to leave this month.
查看答案
基于以下描述：有关系模式R(S，T，C，D，G)，根据语义有如下函数依赖集：F＝{(S，C）→T，C→D，(S，C）→G，T→C}。
关系模式R的候选码
A. 只有1个，为(S，C）
B. 只有1个，为(S，T)
C. 有2个，为(S，C）和(S，T)
D. 有2个，为(S，C）和(T)
听力原文：W: Have you ever been to America？
M: No, but I will go there this summer holiday.
Q: What will the man do this summer holiday？
(17)
A. He will go to America.
B. He will go to work.
C. He will go to see his grandpa.
国标码与机内码之间的区别是
A. 在机器内所占的存储单元不同
B. 机内码是ASCII码，国标码为非ASCII码
C. 国标码每个字节最高位为1，机内码每个字节最高位为0
D. 机内码每个字节最高位为1，国标码则为0
下列选项属于学生权利的是（）。
A. 在学业成绩和品行上获得公正评价
B. 遵守学生行为规范
C. 努力学习，完成规定的学习任务
D. 遵守学校的管理制度和规定
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